Flights from Washington DC to Seattle Tacoma

Our cheapest offers for flights from Washington DC to Seattle Tacoma

Here you can compare cheap flights from Washington DC (WAS) to Seattle Tacoma (SEA) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Seattle Tacoma. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Washington-DC
Seattle-Tacoma
Outbound
11/03/25
1 Stopover (DEN)
F90689, F93405
09h 31min
Return
11/12/25
direct
AS0002
05h 10min
Frontier Airlines
$252
Best option
Washington-DC
Seattle-Tacoma
Outbound
10/18/25
direct
HA6703
05h 55min
Return
11/17/25
direct
AS0002
05h 10min
Hawaiian Airlines
$343
Washington-DC
Seattle-Tacoma
Outbound
11/03/25
1 Stopover (DEN)
F90689, F93405
09h 31min
Return
11/12/25
1 Stopover (DEN)
F93406, F90686
27h 04min
Frontier Airlines
$254
Washington-DC
Seattle-Tacoma
Outbound
11/03/25
1 Stopover (PDX)
AS0009, AS2190
08h 14min
Return
11/12/25
direct
AS0002
05h 10min
Alaska Airlines ?
$257
Washington-DC
Seattle-Tacoma
Outbound
11/03/25
1 Stopover (DEN)
F90689, F93405
09h 31min
Return
11/12/25
1 Stopover (DEN)
F93406, F90686
27h 04min
Frontier Airlines
$265
Washington-DC
Seattle-Tacoma
Outbound
11/03/25
1 Stopover (PDX)
AS0009, AS2190
08h 14min
Return
11/12/25
direct
AS0002
05h 10min
Alaska Airlines ?
$285
Washington-DC
Seattle-Tacoma
Outbound
11/03/25
1 Stopover (PDX)
AS0009, AS2190
08h 14min
Return
11/12/25
direct
AS0002
05h 10min
Alaska Airlines ?
$292
Washington-DC
Seattle-Tacoma
Outbound
10/18/25
1 Stopover (ORD)
AA1187, AA3029
08h 29min
Return
11/17/25
1 Stopover (ORD)
AA2442, AA2345
06h 30min
American Airlines ?
$321
Washington-DC
Seattle-Tacoma
Outbound
06/07/25
1 Stopover (DEN)
F90689, F93405
09h 34min
Return
06/23/25
1 Stopover (BOS)
B60198, B62355
09h 48min
Frontier Airlines ?
$347
Washington-DC
Seattle-Tacoma
Outbound
06/18/25
1 Stopover (SAN)
AS0015, AS1097
11h 10min
Return
07/15/25
1 Stopover (DEN)
F91176, F90686
13h 52min
Alaska Airlines ?
$353
Prices based on recent searches, subject to last-minute changes
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Important flight information

Flight information: Washington-DC - Seattle-Tacoma

Roundtrip from $251.27
Flight duration min. 05:50 / max. 06:15
Return flight duration min. 04:41/ max. 08:20
Distance 3741 km
Flights per week 45
Departure airport Airport Washington-DC (WAS)
Arrival airport Airport Seattle-Tacoma International Airport, WA (SEA)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Seattle-Tacoma
Flight destinations with a similar price
Flight destinations with a similar price