Alaska Airlines has round-trip flights from Seattle (SEA) to Kailua (KOA) for $197, NONSTOP. Flights August to November. Departures on Monday, Tuesday, Wednesday, and Sunday. Origin/Destination reversible. No Thanksgiving dates.
Priceline has “Express Deals” on most of these dates for about $181; which is cheaper than the published rate on Alaska Airlines. With “Express Deals” the airline and exact flight are hidden until after purchase and those purchases are final. There is no 24-hour free cancellation for “Express Deals”. The flight is guaranteed to be on a major airline. Be sure to select the deal with 0 to 1 stops and a layover less than 3-hours.
A Carry-on bag and also a personal item is allowed for free on Alaska Airlines. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.
Click for more details and booking links Nonstop Flights: Seattle to/from Kailua-Kona, Hawaii $181-$197 r/t [August-November] (No Thanksgiving) – Alaska Airlines / Priceline Express