Flight Routes from Washington DC to Seattle Tacoma

Trip type

Our cheapest offers for flights from Washington DC to Seattle Tacoma

Here you can compare cheap flights from Washington DC (DCA) 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
05/16/26
1 Stopover (PHL)
AA5601, AA2763
10h 39min
Return
05/29/26
direct
AS0002
05h 14min
American Airlines ?
$398
Best option
Washington DC
Seattle-Tacoma
Outbound
03/28/26
direct
AS0003
06h 02min
Return
04/25/26
direct
AS0002
05h 16min
Alaska Airlines
$546
Washington DC
Seattle-Tacoma
Outbound
05/16/26
1 Stopover (SAN)
AS0015, AS0685
10h 00min
Return
05/29/26
1 Stopover (SAN)
AS1367, AS0014
11h 00min
Alaska Airlines ?
$414
Washington DC
Seattle-Tacoma
Outbound
05/16/26
1 Stopover (SAN)
AS0015, AS0685
10h 00min
Return
05/29/26
1 Stopover (SAN)
AS0664, AS0014
12h 00min
Alaska Airlines ?
$443
Washington DC
Seattle-Tacoma
Outbound
07/26/26
1 Stopover (ORD)
UA2148, UA2627
08h 49min
Return
08/05/26
1 Stopover (ORD)
UA2618, UA1941
08h 12min
United Airlines ?
$478
Washington DC
Seattle-Tacoma
Outbound
07/26/26
1 Stopover (ORD)
UA2148, UA2627
08h 49min
Return
08/05/26
1 Stopover (IAH)
UA2135, UA0625
08h 24min
United Airlines ?
$484
Washington DC
Seattle-Tacoma
Outbound
05/16/26
1 Stopover (ORD)
AA1328, AA1288
08h 04min
Return
05/29/26
1 Stopover (ORD)
AA2922, AA2769
09h 03min
American Airlines ?
$498
Washington DC
Seattle-Tacoma
Outbound
07/26/26
1 Stopover (DEN)
F90685, F94545
29h 40min
Return
08/05/26
1 Stopover (DEN)
F93406, F90686
22h 39min
Frontier Airlines ?
$677
Washington DC
Seattle-Tacoma
Outbound
05/16/26
1 Stopover (DEN)
F90685, F94545
29h 27min
Return
05/29/26
4 Stopovers (SFO, SAL, UIO, IAH)
AS0725, AV0563, AV0457, UA1005, UA0625
30h 46min
Frontier Airlines ?
$742
Washington DC
Seattle-Tacoma
Outbound
03/28/26
1 Stopover (ORD)
UA1793, UA2211
19h 15min
Return
04/25/26
3 Stopovers (CLT, SJO, IAH)
AA2791, AA1209, UA1589, UA0654
71h 31min
United Airlines ?
$870
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 $397.67
Flight duration min. 06:15
Return flight duration min. 04:55/ max. 08:20
Distance 3743 km
Flights per week 16
Departure airport Airport Washington DC - Ronald Reagan National Airport, VA (DCA)
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