Washington to Seattle

IADSEA

Fly from Washington to Seattle starting at USD 145 with American Airlines.Best fare available on Sep 20, 2026.Limited seats. Better plans. Book before it's gone.

Washington to Seattle cheapest flights this week

3 Sept
Frontier Airlines
08:59IAD
18:28SEA
1 StopUSD 232VIEW DEAL
3 Sept
American Airlines
06:09IAD
16:16SEA
1 StopUSD 340VIEW DEAL
4 Sept
Frontier Airlines
21:54IAD
12:19SEA
2 StopUSD 315VIEW DEAL
5 Sept
Frontier Airlines
08:59IAD
13:39SEA
1 StopUSD 211VIEW DEAL
9 Sept
Frontier Airlines
06:35IAD
12:42SEA
1 StopUSD 208VIEW DEAL
10 Sept
Frontier Airlines
06:00IAD
12:42SEA
1 StopUSD 210VIEW DEAL
11 Sept
Frontier Airlines
06:00IAD
21:28SEA
1 StopUSD 153VIEW DEAL
12 Sept
Frontier Airlines
06:00IAD
12:42SEA
1 StopUSD 210VIEW DEAL
20 Sept
American Airlines
06:52IAD
16:19SEA
1 StopUSD 145VIEW DEAL
23 Sept
Frontier Airlines
16:36IAD
21:36SEA
2 StopUSD 163VIEW DEAL

Washington to Seattle monthly flight fare trend

Sep
from USD 145
Oct
from USD 128
Nov
from USD 133
Dec
from USD 350
Jan
from USD 243
Feb
from USD 243

Airport Details

Origin

Washington

Washington Dulles International Airport (IAD)

Dulles, IAD
Zone

New York

Elev

312 ft

Destination

Seattle

Seattle–Tacoma International Airport (SEA)

Seattle, SEA
Zone

Los Angeles

Elev

433 ft

Flights from Washington

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