
Lowest Prices
Uncover the best deals on IAD to SEA flights by comparing fares from hundreds of airlines and agencies.
Uncover the best deals on IAD to SEA flights by comparing fares from hundreds of airlines and agencies.
Useful information for finding cheap flights from Washington Dulles International to Seattle Tacoma International and booking your next trip
Cheapest Round Trip Flight
$441
Jun 25 – Jul 01
The cheapest round trip flight from Washington Dulles International to Seattle Tacoma International is currently $441
Cheapest Direct Flight
$686
Jun 25
The cheapest nonstop flight from Washington Dulles International to Seattle Tacoma International is currently $686
Fastest Flight
9h 8m
The fastest nonstop flight from Washington Dulles International to Seattle Tacoma International takes 9h 8m
Origin Airport | Washington Dulles International , Washington, US |
Destination Airport | Seattle Tacoma International , Seattle, US |
Distance | miles |