Home Flight Deals United: Washington D.C. – Kauai, Hawaii (and vice versa). $459 (Basic Economy) / $559 (Regular Economy). Roundtrip, including all Taxes By 3 weeks Ago Share on FacebookShare on Twitter Categories: Flight Deals Related Content American: Seattle – Portland, Maine (and vice versa). $198 (Basic Economy) / $298 (Regular Economy). Roundtrip, including all Taxes By June 30, 2024 American: Los Angeles – Portland, Maine (and vice versa). $236 (Basic Economy) / $336 (Regular Economy). Roundtrip, including all Taxes By June 30, 2024 Lufthansa: San Francisco – Cairo, Egypt. $774. Roundtrip, including all Taxes By June 30, 2024 United: Philadelphia – San Jose, Costa Rica. $274 (Basic Economy) / $364 (Regular Economy). Roundtrip, including all Taxes By June 30, 2024 Copa: Washington D.C. – Sao Paulo, Brazil. $544 (Basic Economy / $684 (Regular Economy). Roundtrip, including all Taxes By June 30, 2024