Plan to arrive at SEA at least two hours before your flight. Use SEA Spot Saver for a quicker security experience.
Round-trip from | $252 (Kiwi.com) |
---|---|
One-way from | $148 (Hawaiian Airlines) |
Popular in | December |
Cheapest in | November |
Average price | $477 |
Good round-trip deal | $330 or less |
Good one-way deal | $238 or less |
Fly from
Fly to
Route
Depart
Return
Price
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Thu 11/6
8:22 pm-5:01 pm
2 stops17h 39m
Washington, D.C. Reagan-National
Sun 11/9
7:00 am-12:13 pm
1 stop8h 13m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Thu 9/18
6:12 am-4:59 pm
1 stop7h 47m
Washington, D.C. Reagan-National
Thu 9/18
6:00 pm-12:30 am
1 stop9h 30m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Sat 11/1
9:22 pm-6:01 pm
2 stops17h 39m
Washington, D.C. Reagan-National
Mon 11/3
7:00 am-12:13 pm
1 stop8h 13m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Wed 10/15
1:46 pm-9:59 pm
Nonstop5h 13m
Washington, D.C. Reagan-National
Wed 10/22
7:00 am-12:07 pm
1 stop8h 07m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Fri 9/12
6:12 am-4:59 pm
1 stop7h 47m
Washington, D.C. Reagan-National
Tue 9/16
5:06 pm-7:56 pm
Nonstop5h 50m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Thu 11/6
1:52 pm-9:59 pm
Nonstop5h 07m
Washington, D.C. Reagan-National
Sun 11/9
7:00 am-12:13 pm
1 stop8h 13m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Thu 10/30
1:52 pm-9:59 pm
Nonstop5h 07m
Washington, D.C. Reagan-National
Mon 11/3
7:00 am-12:13 pm
1 stop8h 13m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Wed 8/27
6:41 am-12:11 pm
1 stop26h 30m
Washington, D.C. Reagan-National
Tue 9/2
7:00 am-11:01 pm
1 stop19h 01m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Fri 11/14
1:52 pm-9:59 pm
Nonstop5h 07m
Washington, D.C. Reagan-National
Sun 11/16
7:00 am-12:13 pm
1 stop8h 13m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Sun 11/2
1:52 pm-9:59 pm
Nonstop5h 07m
Washington, D.C. Reagan-National
Wed 11/5
7:00 am-12:13 pm
1 stop8h 13m
The price you pay for your flight from Seattle to Washington, D.C. Reagan-National Airport may vary depending on when you book. For the best chance of a lower fare, look to book 88 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, February is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of $278). Flying from Seattle to Washington, D.C. Reagan-National Airport in March is currently the most expensive (average of $335). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Unlike at noon, when flights are generally more expensive, you can save up to 34% on flights from Seattle to Washington, D.C. Reagan-National Airport by exploring options for tickets in the afternoon.
Travelers seeking maximum savings on their Seattle to Washington, D.C. Reagan-National Airport flight should consider departing on Thursday afternoons when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from SEA to DCA are scheduled on a Monday (9 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (1 on average).
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Jonathan,Jul 2025
SEA - BOS
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Jonathan,Jul 2025
SEA - BOS
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Jonathan,Jul 2025
SEA - BOS
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Jonathan,Jul 2025
SEA - BOS
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Jonathan,Jul 2025
SEA - BOS
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Jonathan,Jul 2025
SEA - BOS
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---|---|---|---|---|
Cheapest$128 | Average$269 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$148 | Average$458 | FlexibilityNo cancel fee | On-time85% | |
Cheapest$275 | Average$409 | FlexibilityNo cancel fee | On-time69% | |
Cheapest$276 | Average$456 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$277 | Average$441 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$296 | Average$456 | FlexibilityNo cancel fee | On-time63% | |
Cheapest$337 | Average$545 | FlexibilityNo cancel fee | On-time75% |