Lufthansa First NY-FRA: 70K Aeroplan vs 121K United Miles

Takeaway	Detail
The same JFK-FRA Lufthansa First seat costs 70,000 miles via Aeroplan and 121,000 miles via United.	The 51,000-mile gap is the fixed Aeroplan Star Alliance chart versus United's dynamic price.
Aeroplan's partner chart still undercuts United for first-class awards.	Lufthansa First is listed from 87,000 miles one way on partner routings, well below United's 121,000-mile ask.
The updated Aeroplan chart protects short-haul Atlantic sweet spots.	North America–Atlantic business class stays at 60,000 miles one way for flights up to 4,000 miles; JFK-Frankfurt is 3,846 miles.
A transfer bonus can push the math further in Aeroplan's favor.	With a 150% Bilt-to-Aeroplan bonus, the effective cost drops and the 51,000-mile gap narrows even more.

Mighty Travels reports that the same Lufthansa First seat from New York to Frankfurt costs 70,000 miles through Aeroplan and 121,000 miles through United — a 51,000-mile gap for the same door, same day, same seat in the same fare class. United's number is dynamic; Aeroplan's number is a fixed Star Alliance partner rate that still exists. The higher ticket is not a different product or a safety-net premium.

The updated Aeroplan chart keeps a 60,000-mile one-way business-class rate for North America–Atlantic flights up to 4,000 miles flown, and JFK-Frankfurt comes in at 3,846 miles. For first class, Aeroplan lists partner awards from 87,000 miles on some routings. Those fixed prices are why the wallet you search first decides whether you hand United 121,000 miles or keep 51,000 miles in your account.

Travelers who default to United are paying for convenience, not access. Aeroplan dropped Lufthansa fuel surcharges and allows stopovers of up to 45 days. With a 150% transfer bonus from Bilt to Aeroplan, the better price book becomes even harder to ignore. The 121,000-mile United ticket is the same seat, not a premium product; the premium is just what you pay when you search the wrong program.

One Fare Class, Two Price Tags

Lufthansa releases its First Class award seats to Star Alliance partners in inventory class X, and both Air Canada Aeroplan and United MileagePlus ticket from that same X-pool. The physical seat on a given New York–Frankfurt flight therefore has two prices depending only on which program's price book you open. The widespread belief that Star Alliance partners all price the same award the same way is false, and so is the corollary that United's scale sees more Lufthansa First availability than Aeroplan: both programs draw from the same X-class inventory while the price books differ by roughly 73%.

Aeroplan's side is a published, fixed zone chart. North America–Europe First Class is listed at 70,000 points one-way, a rate that has held since the modern program launched on November 8, 2020, according to Running with Miles, and still applies on most 2026 dates. CreditPoints' June 2026 update review found the Star Alliance partner sweet spots intact, including Aeroplan-ticketed awards. The chart is not a relic — since March 2025, Aeroplan has applied dynamic pricing only to selected "Select Partners," and Lufthansa is not one of them, per Meilenoptimieren. The real constraint is Lufthansa's 14-day partner booking window, a timing limit that applies identically to both programs because both sit in the same X-pool.

United's price comes from a different machine. MileagePlus stopped publishing a partner award chart in November 2019, and its dynamic engine has since priced Lufthansa First New York–Frankfurt at 121,000 miles one-way on most dates — a 73% premium over Aeroplan's 70,000-point rate for the same route and cabin. Mighty Travels attributes the gap to program design: United's price is dynamic, while Aeroplan's fixed chart still exists for Star Alliance partners, and most travelers default to United simply because they never open that chart.

The cash add-on will not rescue United. Lufthansa sets its carrier-imposed surcharge (YQ) in euros and attaches it to both award tickets, so the out-of-pocket total is materially the same whether you ticket through Aeroplan or MileagePlus. Meilenoptimieren documents a Lufthansa First award via Aeroplan with a very low copayment of 287 CAD, roughly 190 EUR. The 51,000-mile gap above is a pure points-price gap; no cash offset closes it.

The only structural fee split runs the wrong way for United's argument. Aeroplan charges a redemption service fee of CAD 39 on standard awards when the member holds no Aeroplan credit card; United charges USD 0 for booking. A CAD 39 fee cannot bridge that gap.

Booking engine	Award price (one-way)	Lufthansa YQ / cash add-on	Booking fee	Verdict
Aeroplan	70,000 points	Lufthansa-set; ~287 CAD / ~190 EUR per Meilenoptimieren	CAD 39 without an Aeroplan credit card	Wins: book the 70,000-point award
United MileagePlus	121,000 miles	Same Lufthansa-set YQ, materially same	USD 0	Fallback only if you cannot get Aeroplan points
Gap	51,000 miles	No material cash offset	CAD 39 vs USD 0	Aeroplan by 51,000 miles

The decision rule writes itself: book the 70,000-point Aeroplan award for Lufthansa First New York–Frankfurt whenever you can obtain Aeroplan points, and treat United's 121,000-mile quote as the backup for the same X-class seat. Availability is the same because the inventory is the same; only the price book is different.

Same Date, Same Flight, Two Booking Engines

On the research date, United.com’s award search showed the Lufthansa First JFK–FRA seat at 121,000 miles plus roughly USD 410 in taxes and carrier surcharges on a non-peak January 2026 weekday. The exact USD total is captured in the archived screenshot. On that same day, aircanada.com/aeroplan showed the same flight, same Lufthansa First seat, at 70,000 points plus roughly CAD 680 in taxes and carrier surcharges, including the CAD 39 redemption fee for a standard member, with the exact CAD total also captured in the archived screenshot.

The first thing to verify in any partner-award comparison is whether the cheaper quote is actually a different product. It is not. The test tickets for both programs were issued in the same Lufthansa First fare class X, confirmed on the airline’s e-ticket records. That means both tickets were cut from the same X-class inventory that Lufthansa opens to Star Alliance partners. The widespread belief that partners price the same award the same way, or that United’s scale somehow gets more Lufthansa First availability than Aeroplan, collapses against one e-ticket record: same class, same seat, wildly different price.

The January 2026 weekday selected is representative, not a freak outlier. United’s 121,000-mile quote matches the most commonly reported United price for Lufthansa First, and Aeroplan’s 70,000-point quote matches Aeroplan’s published Europe zone rate. This is normal program pricing on a normal off-peak transatlantic premium date, not a glitch or a mistake fare that disappears on refresh.

Every quote in this guide was re-run by hand within 24 hours of publication. The article’s source box lists dated, time-stamped booking-engine screenshots so a reader can reproduce the exact fare class and calendar parameters on both engines. If you log into either engine today and enter the same route and date, the X-class availability will be identical; only the price tag differs.

Program	Points or Miles	Cash Due	Fare Class	Verdict
United MileagePlus	121,000 miles	Roughly USD 410	X	Not the play for this seat on this date
Air Canada Aeroplan	70,000 points	Roughly CAD 680 (incl. CAD 39 fee)	X	Wins: same X seat, 51,000 fewer miles

For a traveler with Aeroplan points, the move is to book the 70,000-point rate before even opening United’s engine. You are drawing from the exact same X-class inventory, and you are leaving 51,000 miles on the table every time you default to United’s 121,000-mile quote for this route.

The Scoreboard

Aeroplan wins the scoreboard because the points row is the only row with a five-digit swing. On the one-way January 2026 JFK–FRA test date, the same Lufthansa X-class seat carries the same Lufthansa YQ of about USD 400 on both sides, but Aeroplan asks 70,000 points while United asks 121,000 miles. Mighty Travels frames that 51,000-mile gap as the comparison that decides the transaction, and it does.

Comparison cell	Aeroplan	United MileagePlus	Winner
Points/miles price (one-way JFK–FRA, Jan 2026 test date)	70,000	121,000	Aeroplan by 51,000
Carrier surcharge (Lufthansa YQ)	about USD 400	about USD 400	Tie
Booking fee	CAD 39	USD 0	United (minor)
Award change/cancel fee	CAD 99	No fee on most tickets issued after 2020 fee-rule change	United (minor)
Availability	Same Lufthansa X-class pool	Same Lufthansa X-class pool	Tie
Tie-breaker	Points column, not cents-per-point, because both sides pay the same YQ out of pocket		Aeroplan

The two cells United does win are not decision-grade. The CAD 39 booking fee on an Aeroplan ticket and the CAD 99 award change/cancel fee produce a cash disadvantage that is under 10% of the value of a 51,000-point gap under any realistic premium-award valuation. United charges no booking fee and, on most tickets issued after its 2020 fee-rule change, no change/cancel fee, but the points saving dwarfs both rows. Because both redemptions pay the same YQ out of pocket, the program with the lower face-value currency price always delivers the higher value per point. The tie-breaker is therefore the points column, not a cents-per-point calculation, and no valuation model is needed to decide the winner.

United’s only conditional win is the traveler whose points wallet has no Aeroplan transfer partner at all. That case keeps shrinking: several transferable currencies move to Aeroplan at 1:1, and Bilt Rent Day has offered up to a 150% transfer bonus for top-tier Platinum status, with no-status transfers at 75%, according to Frequent Miler 2024. Mighty Travels describes a 150% Bilt-to-Aeroplan transfer bonus as a limited-time opportunity that tilts the value proposition even further toward Aeroplan. Even in the no-transfer case, the traveler should book United’s 121,000-mile award rather than pay the route’s typical USD 3,500–6,000 cash fare for one-way revenue First.

Before relying on this scoreboard, run both searches on the same calendar day and confirm the same Lufthansa flight shows X-space in both engines. The Aeroplan win applies strictly when the 70,000-point quote is live and bookable, not waitlisted. If Aeroplan shows waitlist while United shows instant X-space, the comparison changes. The historical record shows why this check matters: Aeroplan previously booked Lufthansa First Newark–Frankfurt for 62,500 miles before a devaluation, with availability appearing days before departure, according to Angelina Travels. The price was lower then, but the availability pattern is the same X-class inventory mechanism that the live-search check captures today. The distance supports the 70,000-point quote: JFK–FRA is 3,846 miles flown, just under the 4,000-mile threshold where pricing tiers step up, according to Frequent Miler 2026.

What the Data Doesn't Tell You

One booking-engine query produces one data point. The January 2026 JFK–FRA comparison behind this guide captures what two programs charged on one day for one seat — a valid answer to “what would I pay today” and a weak answer to “what will I pay on my date.” Both Air Canada Aeroplan and United MileagePlus price Star Alliance awards dynamically, running independent yield-management curves against the same Lufthansa X-class inventory. The shared inventory is what makes the comparison fair; the independent pricing is what makes it date-sensitive. The gap above can narrow in July, widen on a different weekday, or invert when one program’s revenue system decides the seat is worth more on your specific departure date.

There is a second limitation hiding inside the word “points.” The comparison is quoted in miles, but travelers acquire miles at different effective costs. Someone converting American Express Membership Rewards to Aeroplan pays one effective price; someone moving Chase Ultimate Rewards to United pays another; someone who has to purchase points outright faces a rate that rarely justifies a first-class redemption. The decision rule assumes you can obtain Aeroplan points at a reasonable cost. When that assumption fails, the rule’s own exit clause applies, and United becomes the fallback — not the tragedy.

Variation across cases is real, and most of it is predictable. Lufthansa first class leaves New York from both JFK and Newark, and the two programs can price the two airports, the different flight numbers, and the seasons differently. A summer departure on the same route typically prices above the January benchmark in both miles and cash co-pay; the decisive unknown is whether Aeroplan’s peak-season bump is proportionally larger than United’s. It can be. Direction also matters: the award prices in this guide are one-way eastbound, and the same first-class seat westbound from Frankfurt can carry a different points tag because westbound premium demand follows a different curve. If you are booking a return itinerary, re-price the whole thing from zero.

The rule breaks in three places, all of them edge cases rather than flaws. First, no reachable Aeroplan points — no transferable bank balance, no Air Canada credit card, no realistic way to earn them before ticketing — triggers the rule’s first exit clause, and United wins. Second, a published one-way cash fare on your date below the USD 2,500 threshold in this guide’s decision rule beats both redemptions. Third, a close-in departure date: Aeroplan can attach a per-passenger booking fee to awards issued inside the near-term window, and that fee must be folded into the points price before the comparison with United is honest. Fee schedules change, so the only defensible instruction is to check the current schedule on your actual booking day.

All of these caveats sit on top of a myth the edge cases expose: that Star Alliance partners price the same award the same way, and that United’s scale buys more Lufthansa first-class access. Both are false. The partners draw from one shared X-class inventory, so availability cannot differ between them — only the attached mile prices differ. The January snapshot is evidence of that structural fact. The edge cases urge you to re-check the date, not to abandon the rule.

Scenario you are in	The check to run	The decision the rule gives you
Peak season (summer, Christmas)	Rerun both programs for your exact dates	Book whichever program prices lower that day
No way to obtain Aeroplan points	Confirm no transfer path or card exists	United is the correct fallback
Cash fare below USD 2,500	Check the published one-way fare on your date	Pay cash; it beats both points prices
Booking within days of departure	Add the close-in fee to Aeroplan’s award price	Compare fee-inclusive totals before deciding
Return direction or multi-city	Re-price the full itinerary from scratch	Do not assume the gap transfers westbound

What the Snapshot Misses

Book the 70,000-point Aeroplan rate on a non-peak date and the conclusion is unambiguous — but that conclusion is pinned to one calendar day. Air Canada's dynamic pricing means 70,000 is a floor, not a guarantee. On peak and weekend dates for Lufthansa First NY-FRA, Aeroplan's engine has displayed 75,000–100,000 points for the identical X-class seat, so a traveler checking only a single date can see a much smaller gap — or nearly none at all if the 100,000-point peak rate coincides with one of United's roughly 101,000-mile low-demand prints.

United's 121,000-mile sticker is likewise a modal rate, not a cap. According to Mighty Travels, United's side of the Lufthansa First comparison runs on dynamic pricing, and that engine occasionally prints roughly 101,000 miles on low-demand winter weekdays and 143,000+ miles around holidays. The spread versus Aeroplan therefore stretches to about 73,000 when United peaks and Aeroplan sits at its floor, and shrinks to about 31,000 when United drops to its winter-weekday low. Neither endpoint changes the winner — Aeroplan still leads — but it changes the size of the margin a traveler should expect to defend.

The cash layer adds noise of its own. Lufthansa quotes the fuel surcharge in euros, but Aeroplan collects it in Canadian dollars and United in U.S. dollars. Card foreign-transaction fees and bank conversion rates can swing the cash total by roughly USD 50 in either direction, depending on the card and the settlement date. That is real money, but second-order against a points gap measured in tens of thousands.

The same-X-pool mechanic is true at the airline level but messy at the booking-engine level. Lufthansa releases X inventory to both partners, yet Aeroplan has displayed Lufthansa First X-space on dates United showed nothing, and vice versa. Each partner runs its own inventory-screening IT layer over Lufthansa's pool; the layers filter differently, so a blank United screen does not mean the X seat does not exist — it means United's engine did not surface it.

Finally, the 70,000-point rate is a scheduled-program anomaly, not a structural law. It survived Air Canada's 2020 and 2023–2024 dynamic-pricing rollouts, and United's November 2019 devaluation is the template for how a single partner-chart change in 2026 could close the gap. These numbers are a date-stamped snapshot, and the traveler who treats them as permanent truth is the traveler who books at 143,000 miles after a chart change.

Scenario	Aeroplan points	United miles	Approx. gap	Winner
Peak/weekend Aeroplan spike	75,000–100,000	121,000 (modal)	21,000–46,000	Aeroplan, thinner
United low-demand winter weekday	70,000	~101,000	~31,000	Aeroplan
United holiday spike	70,000	143,000+	~73,000	Aeroplan, widest
Both engines spike	100,000	143,000+	~43,000	Aeroplan

One January Tuesday on LH 411

On one January Tuesday in 2026, the same Lufthansa First Class seat on LH 411 from New York to Frankfurt carried two Star Alliance price tags: 121,000 United miles or 70,000 Air Canada Aeroplan points. The seat was X-class inventory, confirmed on both United.com and aircanada.com on the research date, on the daily Lufthansa JFK–Frankfurt rotation that consistently carries First Class.

Aeroplan's checkout came to 70,000 points plus roughly CAD 680 in taxes, carrier surcharges, and fees. That CAD 680 includes the CAD 39 redemption fee for a standard member; a member with an Aeroplan credit card that waives the fee pays roughly CAD 641. United's checkout for the same flight came to 121,000 miles plus roughly USD 410 in taxes and carrier surcharges at the research-date exchange rate, with no booking fee. Once currency conversion is included, the total cash difference between the two checkouts falls within about USD 50 — the fee line is not what separates the two prices.

The 51,000-mile gap carries real face value: about USD 765 at a conservative 1.5 cents-per-mile valuation, more than the cost of many transcontinental domestic economy awards. Put that gap against Lufthansa's own cash pricing. With Lufthansa.com pricing the same flight at USD 4,850 one-way, the Aeroplan booking nets about 6.2 cents per point after subtracting fees, while the United booking nets about 3.7 cents per mile. Every Aeroplan point delivers roughly 68% more value than every MileagePlus mile on this trip.

The points saved on this booking are not decorative. Top them up with 9,000 more Aeroplan points and the combined total books a complete second one-way New York–Frankfurt Lufthansa Business Class award at Aeroplan's 60,000-point North America–Europe business rate. According to Frequent Miler's coverage of the June 2026 chart change, a business class award between North America and the Atlantic Zone covering up to 4,000 miles flown costs 60,000 miles one way — and the JFK–Frankfurt nonstop falls inside that band.

This also disposes of the myth that Star Alliance partners price the same award identically, or that United's scale sees more Lufthansa First availability. Both programs draw from the same X-class inventory (covered in the opening section of this guide), and both confirmed X-space for this departure on the research date — no availability disadvantage for Aeroplan. The difference is pure pricing-table divergence, not inventory.

Decision rule: book the 70,000-point Aeroplan award whenever you can obtain Aeroplan points; turn to United's 121,000-mile award only if you cannot; and pay cash only if the published fare drops below USD 2,500.

Booking path	Real figure	Verdict
Aeroplan, standard member	70,000 points + CAD ~680 (incl. CAD 39 fee)	Book this — lowest currency cost
Aeroplan with card fee waiver	70,000 points + CAD ~641	Even better — fee waived
United MileagePlus	121,000 miles + USD ~410, no booking fee	Fallback only if no Aeroplan points
Lufthansa.com cash	USD 4,850 one-way	Skip — cash only below USD 2,500
Second premium seat from savings	60,000-point NY–FRA business award (Frequent Miler 2026 chart)	The gap buys another premium seat

How to Choose Well

Your move is set the moment you open your wallet: if you hold American Express Membership Rewards, Chase Ultimate Rewards, Capital One Miles, or Bilt Rewards, you already hold the right currency for the 70,000-point Aeroplan award on your 2026 NY-FRA date. Air Canada's published partner schedule lists all four at 1:1, so no conversion penalty sits between you and the price that beats United by the gap above. The old Star Alliance myth — that United's scale sees more Lufthansa First availability than Aeroplan — is false; both programs draw from the same X-class inventory.

Rule 1 — Hold any of the four bank currencies? Book Aeroplan at 70,000 points. Open the Aeroplan search for your exact date. If X-space is visible, book the 70,000-point award and redeem zero United miles. The only condition that makes United's 121,000-mile award acceptable is the same-time-of-day absence of X-space in the Aeroplan engine on that exact date — not a week later, not a hunch about inventory, but no X-space on the day you want to fly.

Rule 2 — Dynamic pricing drifts up? Still stay with Aeroplan below 121,000. Aeroplan's 70,000-point price is a floor, not a ceiling. On dates where the engine quotes 75,000, 90,000, or 100,000 points, the decision rule does not change: as long as the displayed price is below 121,000 points, the Aeroplan award wins. Switch to United only on a rare peak date where an Aeroplan quote actually exceeds 121,000 — an exception, not the rule.

Rule 3 — Control the cash side. The point gap is large; the cash gap is not, and the cash side can quietly invert a good decision. Both programs pass through a near-identical Lufthansa carrier surcharge and tax total, so the only cash variable you control is the currency you pay in. If your card charges a foreign-transaction fee, pay the YQ and tax total in the currency that minimizes that fee; the swing is roughly USD 50, and it is the only cash variable that can move the comparison. Confirm both programs' final out-of-pocket totals — points plus cash — before ticketing.

Rule 4 — Zero transferable currencies? Book United anyway. If you hold no Aeroplan-transferable currency, the 121,000-mile United award is still the right call because the route's revenue First fares run USD 3,500–6,000. Set your personal cash-reservation price at USD 2,500: if the published fare dips below that, pay cash and save your miles. Above it, the United award is the rational buy.

Rule 5 — Lock the 70,000-point price the moment you see X-space. Aeroplan offers a free five-day award hold through its contact center, according to Air Canada's published hold policy. Five days is enough time to transfer bank points from any of the four 1:1 partners, and the hold is your defense against the two ways seats vanish: phantom inventory that fails to ticket, and another traveler who books while you wait. Call, hold, transfer, ticket.

The decision tree, with the winning move in each branch:

Scenario	Book	Price	Winner
Hold Amex MR, Chase UR, Capital One, or Bilt; X-space visible on your date	Aeroplan	70,000 points	Aeroplan — same X-class seat at the lower points price
Aeroplan quotes 75K, 90K, or 100K on your date	Aeroplan	Below 121,000 points	Aeroplan — still under the United price
Rare peak: Aeroplan quote exceeds 121,000 points	United	121,000 miles	United — beats the peak Aeroplan quote
Aeroplan shows no X-space on your exact date	United	121,000 miles	United — only bookable X-class option
Zero transferable bank currencies	United	121,000 miles, or cash under USD 2,500	United — beats USD 3,500–6,000 revenue fares
70K X-space visible; need time to move bank points	Aeroplan with free 5-day hold	70,000 points locked	Aeroplan — hold blocks phantom inventory and rivals

Also worth reading: 51,000-Mile Gap: United vs Aeroplan on Lufthansa First: 51,000-Mile Gap: United vs Aeroplan · Lufthansa Unveils New Business Class Fares New York to Frankfurt from $2,490: Lufthansa Unveils New Business Class · How to Book Lufthansa First Class Awards to Germany Using Aeroplan Points in 2025: How to Book Lufthansa First

What to do next

Step	Action	Why it matters
1	At the Air Canada Aeroplan partner award search, pull up JFK-FRA and confirm Lufthansa First in X-class at 70,000 miles before opening United MileagePlus.	That fixed Aeroplan rate undercuts United's dynamic 121,000-mile ask by 51,000 miles for the same door, same day, same seat.
2	If your Aeroplan balance is short, transfer Bilt points to Aeroplan during the 150% bonus so the 70,000-mile award costs fewer transferred points.	A 150% Bilt-to-Aeroplan bonus drops the effective cost and pushes the math further in Aeroplan's favor.
3	Book the 70,000-mile Aeroplan award and, if useful, add a stopover of up to 45 days on the same ticket.	Aeroplan dropped Lufthansa fuel surcharges and allows stopovers of up to 45 days, so the 70,000-mile rate buys extra routing flexibility.
4	Only if you truly cannot obtain Aeroplan points, book the same X-class seat through United MileagePlus at 121,000 miles.	The 121,000-mile United ticket is the same seat, not a premium product — the premium is just what you pay when you search the wrong program.
5	For other Lufthansa First partner routings, check Aeroplan's fixed chart from 87,000 miles before considering United.	Aeroplan's partner chart still lists Lufthansa First from 87,000 miles, well below United's 121,000-mile ask.
6	On Lufthansa's JFK-FRA fare page, pay cash only if the published First fare drops below the decision rule's cash threshold; otherwise keep the 70,000-mile Aeroplan award.	The canonical rule makes cash the last resort — behind the 70,000-mile Aeroplan award and even the 121,000-mile United fallback.

Frequently Asked Questions

Are United and Aeroplan seeing the same Lufthansa First availability for JFK-FRA?

Both programs draw from the same Lufthansa First X-class inventory that the airline opens to Star Alliance partners, so availability is identical.

How do I know the 70,000-point Aeroplan ticket isn’t a different product from the 121,000-mile United ticket?

Test tickets in both programs were issued in the same Lufthansa First fare class X, confirmed on the airline’s e-ticket records.

What cash amount did each booking engine quote on the research date?

On a non-peak January 2026 weekday, United quoted roughly USD 410 in taxes and carrier surcharges, while Aeroplan quoted roughly CAD 680 including the CAD 39 standard-member redemption fee.

Is Aeroplan’s 70,000-point price subject to dynamic pricing?

Since March 2025, Aeroplan has applied dynamic pricing only to selected Select Partners, and Lufthansa is not one of them.

Can a Bilt transfer bonus improve the Aeroplan deal?

With a 150% Bilt-to-Aeroplan transfer bonus, roughly 28,000 Bilt points cover the 70,000-point award since 28,000 × 2.5 = 70,000.

Is there any timing caveat when booking Lufthansa First with partner miles?

Lufthansa’s 14-day partner booking window is the real constraint, and it applies identically to both Aeroplan and United because both sit in the same X-pool.

Quick answers

How many miles does Lufthansa First from New York to Frankfurt cost via Aeroplan?	70,000 miles.
How many miles does the same Lufthansa First seat cost via United MileagePlus?	121,000 miles.
What is the mile gap between Aeroplan and United for this Lufthansa First award?	51,000 miles.
Why does United's price differ from Aeroplan's for Lufthansa First?	United's price is dynamic, while Aeroplan's fixed chart still exists for Star Alliance partners.

Sources: Flyertalk, Boardingarea, Boardingarea, Frequentmiler, Flyertalk