That's as cheap as I have ever seen Hawaii flights from the West Coast!
Delta direct flight codeshares on Alaska (or via LAX on Delta planes) price out as $188 incl. taxes and fees for many dates in the next 3 months. Use ITA Matrix to find available dates and then use expedia.com or Cheapoair to book your flights.
There are flights available for $255 for 12/30 and 12/31 departures even.
Fantastic deal – this won't last.