Beginning October 12th, Alaska Airlines will offer non-stop service from Seattle to Honolulu.  Then, beginning October 28th, non-stop service from Seattle to Kauai’s Lihue airport will be added.  There is also a seasonal Anchorage to Honolulu service that runs from December 9th through April 13th.  

Alaska Airlines offering a special introductory price through Saturday June 2nd:

introductory one-way fares, with certain restrictions and blackout dates, for three days beginning Thursday: $109 from Seattle to Honolulu, $149 from Seattle to Lihue and $159 from Anchorage to Honolulu.

The Seattle Times reports that the Alaska Air Group wants to add the Big Island and Maui to its list of Hawaii destinations but has no timetable in mind.