Thumb Score: +14 If you don't mind a long layover in Seattle (possibly up to 10 hrs) then here's an airline deal going out of Washington DC / Baltimore (BWI) to Kona Kailua Hawaii for $488 round trip on Alaska Airlines. Alaska's flights are regular main cabin economy. Travel Availability: Departs BWI: April 17, 18, 24, 29, 30; May 1, 2, 6, 8, 14, 15 Returns: April 25, 26; May 1, 2, 3, 7, 8, 9, 10,, 14, 15, 21, 22 Use dates and book it on Alaska Airlines [alaskaair.com].