The contributors of Flight-Report published 2 reviews on 2 airlines on the route Washington - Washington Dulles (IAD) → Seattle - Seattle Tacoma (SEA). The airline with the best average rating is Delta Air Lines with 7.4/10. The average flight time is 5 hours and 13 minutes.
Airlines on this route are:
Access to the airport of Washington (IAD) is rated as average; plan your trip in advance.
Washington has an another airport to go to Seattle : Washington - Ronald Reagan Washington National (DCA)