
Lowest Prices
Uncover the best deals on SEA to IAD flights by comparing fares from hundreds of airlines and agencies.
Uncover the best deals on SEA to IAD flights by comparing fares from hundreds of airlines and agencies.
Useful information for finding cheap flights from Seattle Tacoma International to Washington Dulles International and booking your next trip
Cheapest Round Trip Flight
$509
Jun 26 – Jun 29
The cheapest round trip flight from Seattle Tacoma International to Washington Dulles International is currently $509
Cheapest Direct Flight
$503
Jun 26
The cheapest nonstop flight from Seattle Tacoma International to Washington Dulles International is currently $503
Fastest Flight
7h 37m
The fastest nonstop flight from Seattle Tacoma International to Washington Dulles International takes 7h 37m
Origin Airport | Seattle Tacoma International , Seattle, US |
Destination Airport | Washington Dulles International , Washington, US |
Distance | miles |