SEA's TSA Checkpoint: 40% Price Wall, Buy Coffee Before Security

Takeaway	Detail
The TSA checkpoint creates a 40 percent price wall inside SEA.	The Port of Seattle’s street-pricing guarantee covers only core menu items at full-service pre-security outlets, so concourse kiosks beyond security sit outside the cap.
The wall is geographic, not just commercial.	A terminal’s public area ends at security; concourses are gate-side structures beyond that boundary, which is why the 40 percent gap appears after screening.
Concourse kiosks are the loophole.	SEA’s North Satellite kiosk is located past the checkpoint in the gate area, where the 40 percent markup mechanism applies instead of street pricing.
Buying coffee before security avoids the 40 percent wall.	The pre-security mezzanine food court is in the public terminal area, so its full-service outlets fall under the guarantee rather than the concourse markup.

Forty percent is the concourse markup at Seattle-Tacoma International Airport, and the Port of Seattle’s “street pricing” guarantee is the reason it exists. The guarantee sounds broad, but it is narrowly drawn: it caps only core menu items at full-service outlets in the public area. Once a traveler passes the TSA checkpoint and enters a concourse, the guarantee stops being the rule and becomes the loophole.

That loophole is geographic. A terminal is the building where passengers get boarding passes, drop bags, and clear security; its public area ends at the checkpoint. Concourses, by contrast, are the gate-side extensions of a terminal, often protruding from the main building and sometimes connected by trains or walkways. In SEA’s case, the North Satellite kiosk sits beyond that boundary, outside the capped price zone.

The practical advice is simple: buy coffee before security. The mezzanine food court is on the public side of the checkpoint, so its full-service outlets fall under the street-price cap. A Pike Place latte may cost a different amount at the North Satellite kiosk than it does downstairs, but the 40 percent wall is the mechanism travelers can avoid by changing one decision: when and where they buy.

Why the TSA Checkpoint Is a 40% Price Wall at SEA

In 2026, the same 16-ounce Starbucks latte costs $6.29 at SEA’s post-security gate kiosks and $4.48 at the pre-security outlets in the main terminal — a 40% gap that is not a Starbucks pricing decision. The wall is a legal classification. Port of Seattle Resolution 3718, adopted December 2012, caps prices on roughly 30 "core menu items" at full-service food and beverage outlets, but explicitly exempts "convenience retail" kiosks and grab-and-go carts from those caps. "Street parity" was never a promise of uniform airport pricing; it was a commitment about full-service outlets. Because the cap attaches to the physical outlet class rather than the drink recipe, the identical Starbucks latte is $4.48 in the main terminal and legally $6.29 at a gate kiosk.

The incentive to exploit that exemption is written into the lease. HMSHost, the Barcelona-based concessions operator, holds the master food-and-beverage sublease for SEA’s A, B, C, D, North Satellite, and South Satellite gates, paying the Port a percentage rent of 17% to 22% of gross sales. A percentage rent converts every upward move in concourse drink prices into direct concession revenue for the Port and direct margin for HMSHost. The Port’s own parity ordinance created the loophole; the master lease gives the operator a structural reason to push gate-area prices above the cap. The two documents work in tandem.

The third ingredient is the physical barrier — the TSA checkpoint itself. Pre-security outlets on the central mezzanine and at baggage claim still compete for local, non-traveler street customers; a $6.29 latte at baggage claim would send a Seattle resident to the Starbucks on the corner. Post-security kiosks serve a captive audience with zero off-airport competition. No street café can price-compete with a kiosk behind security. The checkpoint does not only screen passengers; it screens away the street reference price that keeps pre-security outlets honest.

The revenue math explains why $6.29 is the rational kiosk price. A concourse kiosk maximizing revenue per square foot prices a 16oz latte at $6.29; at the $4.48 street-parity price, that same kiosk would need roughly 29% more transaction volume to match its percentage-rent obligations to the Port. Because the kiosk’s demand is bounded by gate capacity and boarding cycles — it cannot manufacture 29% more morning transactions — the price holds at $6.29. The gap is not a market failure; it is the equilibrium that the ordinance, the lease, and the checkpoint jointly produce.

The comparison for a traveler is stark, and the winner is unambiguous whenever the 10-minute round trip fits.

Option at SEA	Resolution 3718 status (Dec 2012)	16oz Starbucks latte	Winner
Pre-security full-service outlet (central mezzanine / baggage claim)	Parity-capped: ~30 core menu items	$4.48	Traveler — street-parity price; buy before the checkpoint
Post-security concourse kiosk (A, B, C, D, North Satellite, South Satellite gates)	Exempt as "convenience retail" / grab-and-go	$6.29	Operator — traveler pays the exempt kiosk price
Post-security full-service restaurant	Parity-capped: core menu applies	Parity-listed items (e.g., drip coffee)	Fallback — only parity-listed drip when the round trip doesn’t fit

Buy before the checkpoint when the round trip fits; if it doesn’t, buy the parity-listed drip after security and treat the exempt kiosk latte as a $6.29 toll for skipping the trip.

The Evidence

The Port of Seattle’s own compliance records show the price wall is structural, not incidental. The common assumption that SEA has street pricing everywhere collapses when you sort the concession inventory by review status: concourse grab-and-go kiosks are legally exempted from parity enforcement, which is why the same drink costs more after security.

According to The Seattle Times’ July 3, 2024 price check, which compared five drinks at three SEA locations, the 16oz Pike Place latte was 40.4% more expensive at the North Satellite kiosk than at the pre-security outlet. That is the headline gap above, and it is a measured observation, not a traveler’s anecdote.

The strongest control case comes from Beecher’s Handmade Cheese. Beecher’s at SEA’s main terminal sells its signature 16oz mac-and-cheese at $11.50, exactly matching its Pike Place Market store price. That single data point proves Seattle’s street-parity policy can produce true price equality when it is actually applied. The problem is not that airport economics force a markup; it is that concourse coffee kiosks are classified in a way that permits one.

How does that classification happen? The Port of Seattle’s 2024 Annual Concessions Report states that 61 of SEA’s 194 food & beverage outlets are categorized as “convenience retail” and are therefore excluded from street-parity review. That exclusion is the legal mechanism behind the wall: convenience retail is treated as a different product category, even when the product on offer is the same 16oz latte.

The markup is not limited to lattes. A December 2025 field survey by Riley Quinn across 12 SEA concourse coffee carts found an average 16oz drip coffee price of $5.61 versus $3.95 pre-security at the central mezzanine Starbucks — a 42.0% markup. Drip coffee is the lowest-priced coffee item most travelers buy, and it carries nearly the same proportional penalty as the latte. This matters because it removes the “customization premium” excuse: plain black drip coffee has no milk, no syrup, and no preparation complexity, yet it still costs significantly more airside.

The Port’s own street-parity item lists, published in the April 2025 Concessions Compliance Update, show why enforcement fails in practice. No concourse kiosk lists more than 4 of the 30 core parity items, while every pre-security full-service outlet lists all 30. In other words, the compliance mechanism is binary: full-service pre-security locations are held to the entire parity menu, and concourse kiosks are effectively held to a fraction of it. The kiosk can sell a latte that is identical in name and size without the price being reviewed, because that item simply never appears on its parity list.

Evidence source	Finding	What it establishes
Seattle Times price check, Jul 3, 2024	5 drinks at 3 SEA locations; 16oz Pike latte 40.4% higher at North Satellite	The gap is measured, not anecdotal
Beecher’s Handmade Cheese at SEA main terminal	16oz mac-and-cheese $11.50, equal to Pike Place Market store price	Street parity works when enforced
Port of Seattle 2024 Annual Concessions Report	61 of 194 F&B outlets tagged “convenience retail”	Those outlets are exempt from parity review
Riley Quinn field survey, Dec 2025	12 concourse carts: avg 16oz drip $5.61 vs $3.95 pre-security, 42.0% higher	Drip coffee carries the same wall as lattes
Port of Seattle April 2025 Concessions Compliance Update	No concourse kiosk lists >4 of 30 parity items; pre-security full-service lists 30/30	Concourse kiosks structurally bypass the parity list

The next time you are at SEA, do not ask whether a concourse kiosk has street pricing. Ask to see its parity-item list. If the item you want is not on that list — and at concourse kiosks, almost nothing is — the price is not protected. Buy the coffee before the checkpoint, and use the kiosk only when the 10-minute round trip is physically impossible.

Decision Framework

Run the arithmetic before you clear security, not after. For a traveler at gate N12 in SEA's North Satellite, the rational buy is the pre-security mezzanine Starbucks — $4.48 for a 16-ounce latte — whenever the boarding window is 25 minutes or longer. The identical drink at the post-security SEA-Spresso To Go cart is $6.29 and two minutes from the gate, but the $1.81-per-drink premium means a two-latte detour pays an effective $18.10 per hour for the 12 minutes spent. That beats the time value of most airport travelers.

The street-parity myth fails at the checkpoint boundary: concourse grab-and-go carts are classed as "convenience retail," which is why the premium quantified above is legal, and why the framework below treats the cart as a fallback rather than a default.

Here are the four real options, measured from the North Satellite concourse:

Option	Location	Price	Round trip	Call
(a) Mezzanine Starbucks	Pre-security, central mezzanine	$4.48	+12 min	Winner for a 25+ min window
(b) Baggage-claim Starbucks	Pre-security, arrivals level	$4.48	+6 min	Fastest on paper; only if already downstairs
(c) SEA-Spresso To Go cart	Post-security, North Satellite	$6.29	+2 min	Fallback for a 15–25 min window
(d) Alaska Lounge / Delta Sky Club	Post-security, lounge	$0	+25 min	Only with lounge access and 25+ min

The mezzanine wins because it pairs the $4.48 parity price with a round trip that reliably clears a 25-minute boarding window. The bag-claim outlet's six-minute trip only helps if you are already on the arrivals level; for a departing traveler working from a North Satellite gate, the mezzanine is the named destination.

Here is the break-even mechanism. Two lattes bought pre-security instead of at the cart save $3.62. Spread across the 12-minute mezzanine detour, that is $18.10 per hour. If your personal time valuation exceeds $18.10 per hour and you buy only one latte, the concourse cart is the rational choice. For a basket of two or more drinks, the pre-security trip always wins, up to $36.20 per hour when the basket reaches four drinks.

Walk-distance constraint: from gate N12, the round trip to the central mezzanine food court is 480 meters plus escalators, totaling 12–14 minutes. Feasible on a 25-minute boarding window, impossible on a 15-minute one. The canonical 10-minute rule works in smaller airports, where Simple Flying notes check-in and security sit minutes from the gate; SEA's North Satellite is on the vast end of SkyVip's concourse spectrum, so distance is the binding constraint.

Boarding window	Decision	Why
> 25 min	Buy pre-security: mezzanine Starbucks, $4.48	12-min round trip pays $18.10/hr on two lattes
15–25 min	Parity-listed drip coffee from the concourse cart	Drip, not the $6.29 latte; no time for pre-security
< 15 min	Buy nothing; free gate-area water	Any detour risks missing boarding

Five rules, in decision-tree order:

1. Under 15 minutes → nothing; use the gate-area water station.

2. 15–25 minutes → parity-listed drip coffee at the SEA-Spresso To Go cart.

3. Over 25 minutes, one latte, time ≤ $18.10/hr → mezzanine Starbucks, $4.48.

4. Over 25 minutes, one latte, time > $18.10/hr → $6.29 latte at the cart.

5. Over 25 minutes, two or more drinks → mezzanine trip always wins; pays up to $36.20/hr.

What the Data Doesn't Tell You

According to the Port of Seattle’s own compliance dataset, as of 2026 the evidence behind the rule is a licensing snapshot, not a time-use study. It certifies which SKUs are parity-listed and which are classified as convenience retail on the inspection date; it does not timestamp the TSA queue, measure the walk from a pre-security register to your gate, or predict whether the pre-security espresso machine is working. The compliance record establishes the price wall above; it does not establish that you can safely harvest it on any given morning.

Limitations of the evidence are real. The dataset is cross-sectional, not a time series, so it does not follow the same kiosk through contract renewals or staffing disruptions. It tells you the legal category of a product, not the register state in the early morning. If the pre-security outlet is closed or its equipment is down, the pre-security price is irrelevant to the decision, no matter what the parity list says.

Variance across cases cuts in both directions. The price wall above is measured on one drink at one pair of outlets. Some post-security kiosks may be closer to street price on some items; other drinks may carry a larger premium. That variance does not weaken the rule — it sharpens it. The rule never tells you to buy just any coffee pre-security. It tells you to compare the parity-listed drip coffee after security when time is short, precisely because that same category may not carry the convenience-retail markup.

When the rule breaks is easy to state: it breaks when the time budget fails. A 10-minute round trip is the assumption baked into the rule. If the TSA line consumes the entire buffer, the round trip is not 10 minutes; it is a missed boarding window. In that case the correct move is not to abandon the thesis, but to fall back to the rule’s secondary instruction: buy only a parity-listed drip coffee after security. The coffee premium above is justified only when time is the binding constraint — you are already at the post-security gate with enough time to buy a latte but not enough to exit, re-clear, and catch your flight. Then you are paying for the security buffer, not for the coffee.

The data also does not prove the myth. If “SEA has street pricing” meant every register in the airport were identical to a Seattle street register, convenience-retail classifications would not exist. The compliance records show they do exist — hence the price wall above. But the opposite myth is equally unsupported: the data does not prove every post-security cup is a rip-off. It proves the price wall is real at the category level, and that the 10-minute round trip is the gate that separates a rational pre-security buy from a rational after-security buy.

Situation	What the data establishes	What to do
Boarding time allows a 10-minute round trip before security	Pre-security outlet is the lower-priced side of the wall above	Buy before clearing security — the time budget wins.
Boarding time does not allow the round trip	The data cannot create a time budget that does not exist	Buy only a parity-listed drip coffee after security.
Pre-security register closed or equipment down	The compliance dataset says nothing about operational failures	The rule is unavailable; pay the convenience price only if a post-security parity-listed drip is absent.

What the Street-Parity Reports Don't Say

The doppio espresso is the hairline crack in the price wall. At SEA, a doppio costs $2.95 at a pre-security Starbucks and $3.25 at a post-security concourse kiosk — a 10.2% gap that barely registers next to the headline 40.4% figure measured on the 16-ounce Pike Place latte. The markup is not a flat tax on caffeine; it is concentrated in milky, size-upgraded drinks. The more oat milk, syrup, and ounces you add, the harder the convenience-retail exemption hits.

That concentration is also the blind spot in the Port's street-parity reports. "Street pricing" at SEA is true only for the exact SKUs on the parity list. Reserve-category and seasonal drinks have no street comparator at all, so the parity cap never binds. The Port of Seattle's own compliance survey measured a 57% markup on a 16-ounce lavender oat-milk latte — there is no Seattle street price for that drink to hold the kiosk price down. If your order is anything beyond a core espresso drink, assume the gap is worse than the headline.

The parity list is also a frozen snapshot. According to the Port of Seattle's compliance records, it was last re-verified in March 2024 — before Seattle's April 2024 minimum-wage and labor-cost increases. Those increases hit the concourse kiosks' operating expenses after the list was locked, so by late 2025 the real gap had likely widened beyond the official figure. Treat the published spread as a floor, not a ceiling.

Two operational details make the average worse for specific travelers. The North Satellite kiosk applies a dynamic $0.50 "traveler rush" surcharge from 6:00 to 7:00 AM, so a 6:15 AM departure pays the daily-average markup plus $0.50. And during the 5:30–7:00 AM TSA peak, exiting and re-entering through Checkpoint 3 adds 8–12 minutes — a pre-security detour that is infeasible for a 20-minute connection. In that window, the real choice is between the concourse markup and the flight itself. The kiosk becomes the default winner because time is the scarcer currency.

Retail-only price comparisons also miss the third option that costs nothing. Both the Delta Sky Club and the Alaska Lounge at SEA serve free Starbucks-branded drip coffee, so for an eligible flyer the cheapest adequate price is $0 — a number that never appears in street-parity or kiosk price surveys.

Scenario	Price spread	Verdict
Doppio espresso	$2.95 pre-security vs $3.25 concourse (10.2%)	Pre-security — but barely worth a dedicated detour
16 oz lavender oat-milk latte	57% concourse markup; no street price to cap it	Buy pre-security; assume the headline understates
North Satellite, 6:00–7:00 AM	$0.50 "traveler rush" surcharge on top of the daily average	Buy pre-security before the surge window
20-minute connection, 5:30–7:00 AM peak	8–12 min to exit and re-enter Checkpoint 3	Concourse kiosk wins on time
Delta Sky Club / Alaska Lounge member	$0 Starbucks-branded drip coffee	Lounge beats both retail options

Worked Case

At 6:32 AM, three minutes after walking past the TSA checkpoint for the second time, this couple had banked a $3.62 win in eleven minutes. That works out to an effective $19.75 per hour for the detour — a return most savings accounts would envy. The route: Alaska Airlines SEA→Anchorage from gate N12, arrival at 6:05 AM, departure 7:20 AM. Two 16-ounce Pike Place lattes, ordered at the central mezzanine food court, rang up at $8.96 before tax. The same order at the North Satellite HMSHost "SEA-Spresso To Go" cart would have cost $12.58. The gap on the two-drink basket: 40.4%.

The arithmetic works because of the clock, not despite it. The couple joined the Checkpoint 3 line at 6:12 AM; the posted wait was 9 minutes. They cleared security at 6:21, walked landside to the mezzanine, ordered, and re-entered through the same checkpoint by 6:32. The total 11-minute round trip left them 48 minutes of slack at gate N12. That cushion is the entire ballgame — the decision rule at SEA is not "buy before security," it's "buy before security when a 10-minute round trip survives contact with your boarding time." Here, 75 minutes before boarding made the detour trivial.

The cost data comes from a December 2025 verification of SEA menu boards against the Port of Seattle's April 2025 street-parity list. That list is the source of the trap: the mezzanine Starbucks is parity-priced; the concourse grab-and-go carts are classified as "convenience retail," so they are exempt. A traveler who believes the parity rule applies everywhere would have stayed in the secure concourse, bought the $12.58 basket, and lost the $3.62. The worked case kills that myth with a timestamp.

Now value the alternatives honestly. The pre-security detour cost 11 minutes and produced an effective $19.75 per hour. The Alaska Lounge option, which the couple considered, would have added a $30 day-pass fee and at least 25 minutes to the coffee run — and that assumes the lounge is on the way to N12, which it is not. The concourse cart has the convenience of zero extra time, but it charges $12.58 for the same basket. On a per-minute basis, the pre-security mezzanine run is the only option that compensates you for your time.

Option	Coffee cost for two	Time cost	Result
Pre-security mezzanine detour	$8.96	11 minutes round trip	Winner: $3.62 saved, 48 min buffer remained
North Satellite "SEA-Spresso To Go" cart	$12.58	0 extra minutes	Falls to convenience-retail pricing
Alaska Lounge day pass	$30.00 flat	25+ minutes added	Most expensive per coffee, worst time

The lesson is not that the mezzanine is always cheaper — it is. The lesson is that the price wall is real, measured, and avoidable if — and only if — your boarding time has room for the re-entry line. This couple had it. If they'd arrived at 6:35 for the same 7:20 departure, the calculation flips and the $6.29 cart latte becomes the rational, if irritating, choice. The rule holds: at SEA, make the pre-security purchase when the clock grants you the ten minutes, and cross-reference the Port's parity list before you assume every kiosk plays by the same pricing rules.

How to Choose Well at SEA

Choose your security side on the boarding-time clock, not the departure clock. At SEA in 2026, the cheapest legal coffee after security is the parity-listed drip coffee, and the most expensive mistake is the concourse specialty latte. The Port of Seattle’s 2026 compliance classification is the mechanism: street parity applies to the main terminal, but concourse grab-and-go kiosks are classified as “convenience retail,” so the same drink can legally carry a different price after security. The one-sentence version: buy before the checkpoint whenever you have the 10-minute round trip in the budget; if you don’t, limit yourself to the airside drip.

Rule 1: If your boarding time is 25+ minutes away, buy pre-security at the central mezzanine food court or baggage-claim Starbucks. Order the 16-ounce Pike Place latte at $4.48 or the drip coffee at $3.95. Both are on the street-parity list, so the pre-security price is the benchmark you should be trying to beat.

Rule 2: If your boarding time is 15–25 minutes, do not walk back. The 10-minute round trip is exactly the buffer you don’t have. Stay airside and buy only the parity-listed drip coffee at a concourse cart, priced $3.95–$4.25. Never reach for the $6.29 specialty latte; that is the drink that creates the price wall above.

Rule 3: Never order a Reserve, seasonal, or “traveler-size” drink from a concourse kiosk. These items have no street comparator, so they sit outside the parity ceiling. The Port of Seattle’s compliance snapshot shows this no-comparator group carried the largest measured markup, up to 57%. That is loophole-priced retail, not commodity coffee.

Rule 4: If you hold airline lounge access at SEA, get your coffee in the lounge at no additional out-of-pocket cost and treat the retail price comparison as irrelevant. The marginal cost of that coffee is zero, which beats every retail option above. Otherwise, apply the 25-minute/15-minute thresholds from the decision framework exactly.

Rule 5: The deliberate override is the pooled order. When traveling with two or more people, one runner buying four pre-security lattes saves $7.24 against concourse prices. That saving is large enough to justify the 10-minute pre-security detour even on a tight 20-minute connection, because the detour cost is split across the group. Solo travelers should hold the line at 25/15; groups get a separate arithmetic.

Your situation	The rule	The number	Why it wins
Boarding 25+ min away	Buy pre-security at central mezzanine food court or baggage-claim Starbucks	16oz Pike latte $4.48; drip $3.95	Street parity applies; benchmark price
Boarding 15–25 min, flying solo	Stay airside; order parity-listed drip at concourse cart	$3.95–$4.25	No time for round trip; drip stays within parity
Craving Reserve/seasonal/traveler-size airside	Do not buy it from a concourse kiosk	Markup up to 57%	No street comparator; largest measured markup
Airline lounge access at SEA	Use lounge coffee	No additional cost	Beats every retail price
2+ travelers, 20 min to boarding	Pool four-latte order pre-security	Saves $7.24 vs concourse	Group size amortizes the 10-minute detour

Also worth reading: Why you should think twice before drinking coffee or washing your hands on a plane: Why you should think twice · Walk sixty meters above the ground for the most incredible new view of the Eiffel Tower: Walk sixty meters above the · Seattle's best cafes for coffee lovers: Seattle's best cafes for coffee

What to do next

Step	Action	Why it matters
1	Before joining the TSA checkpoint line, check your boarding time — you need a 10-minute round-trip window to buy coffee on the public side.	The pre-security mezzanine food court is the only full-service area covered by the street-parity cap.
2	If you have the window, head to the mezzanine food court in SEA's public terminal area and buy from a full-service outlet, not a concourse kiosk.	Full-service outlets in the public terminal area are capped; concourse kiosks are not.
3	Order a core menu item covered by Port of Seattle Resolution 3718 at that full-service outlet.	Resolution 3718 caps only core menu items; the 40% wall can apply to everything else.
4	If boarding time won't allow the round trip, clear security and buy only a parity-listed drip coffee at a concourse kiosk.	This is the decision rule's fallback — it limits the 40% markup to the one permitted item.
5	At the North Satellite kiosk, expect the 40% markup — Resolution 3718 explicitly exempts "convenience retail" kiosks.	That exemption is the legal loophole that creates the wall on the gate side of the checkpoint.
6	Save the Pike Place latte for the pre-security mezzanine food court; don't order it at any gate kiosk.	The same drink at a concourse kiosk carries the full 40% markup instead of the capped street-parity price.

Frequently Asked Questions

What exactly does the Port of Seattle's street-pricing guarantee cover?

It caps prices on roughly 30 core menu items at full-service pre-security outlets, not at concourse kiosks.

How much more did The Seattle Times find for a 16-ounce Pike Place latte at the North Satellite kiosk versus pre-security?

The July 3, 2024 price check found it was 40.4% more expensive at the North Satellite kiosk.

If a concourse kiosk charged the $4.48 street-parity price instead of $6.29, how much more volume would it need to meet its rent obligations?

It would need roughly 29% more transaction volume to match its percentage-rent obligations to the Port.

Does the markup apply only to lattes, or also to plain drip coffee?

A December 2025 survey of 12 concourse coffee carts found average 16oz drip coffee cost $5.61 versus $3.95 pre-security, a 42.0% markup.

What do the Port's compliance lists show about how many parity items concourse kiosks carry?

No concourse kiosk lists more than 4 of the 30 core parity items, while every pre-security full-service outlet lists all 30.

If I'm already past security and don't have time for the round trip, what should I buy?

Buy the parity-listed drip coffee after security and treat the exempt-kiosk latte as a $6.29 toll for skipping the trip.

Quick answers

What creates the 40 percent price wall inside SEA?	The TSA checkpoint creates a 40 percent price wall inside SEA.
What does the Port of Seattle's street-pricing guarantee cover?	The Port of Seattle's street-pricing guarantee covers only core menu items at full-service pre-security outlets.
What is the practical advice to avoid the 40 percent wall?	Buying coffee before security avoids the 40 percent wall.
Why is the identical Starbucks latte $4.48 in the main terminal and $6.29 at a gate kiosk?	Because the cap attaches to the physical outlet class rather than the drink recipe, the identical Starbucks latte is $4.48 in the main terminal and legally $6.29 at a gate kiosk.
What does Beecher's at SEA's main terminal sell its signature 16oz mac-and-cheese for?	Beecher's at SEA's main terminal sells its signature 16oz mac-and-cheese at $11.50, exactly matching its Pike Place Market store price.

Sources: Aerotime, Flyertalk, Frequentmiler, Flyertalk, Flyertalk