Cheap Flights from Seattle, WA to Washington D.C., DC from $126

One way Round trip

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Return flight: Washington D.C. – Seattle

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On Cheapflightsplus.com you will find 12 direct and 28 connecting flights from Seattle to Washington D.C.. You can compare airfare deals from 5 airlines and multiple travel sites from $126, book and save on cheap plane tickets and last minute offers. Also check out SEA-WAS flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Seattle to Washington D.C. Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $126 (one-way), $216 (round-trip).

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Best Flights from Seattle to Washington D.C. Today

Take a look at the list of non stop flights and flights with layovers from Seattle to Washington D.C. with the lowest price of $126. The fastest direct flight takes 4h 57m and the fastest connecting – 6h 52m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $140 Find flight	15:59 Seattle Seattle-Tacoma Intl	23:59 Washington D.C. Dulles International	5h 0m	Alaska Airlines	AS348
from $159 Find flight	13:58 Seattle Seattle-Tacoma Intl	21:59 Washington D.C. Ronald Reagan	5h 1m	Hawaiian Airlines	HA6702
from $163 Find flight	23:30 Seattle Seattle-Tacoma Intl	07:27+1 день Washington D.C. Dulles International	4h 57m	Alaska Airlines	AS367
from $164 Find flight	13:58 Seattle Seattle-Tacoma Intl	21:59 Washington D.C. Ronald Reagan	5h 1m	Alaska Airlines	AS2
from $203 Find flight	23:30 Seattle Seattle-Tacoma Intl	07:27+1 день Washington D.C. Dulles International	4h 57m	Hawaiian Airlines	HA6718
from $206 Find flight	09:15 Seattle Seattle-Tacoma Intl	17:13 Washington D.C. Dulles International	4h 58m	Alaska Airlines	AS406
from $211 Find flight	23:20 Seattle Seattle-Tacoma Intl	07:17+1 день Washington D.C. Dulles International	4h 57m	United Airlines	UA2211
from $211 Find flight	08:34 Seattle Seattle-Tacoma Intl	16:43 Washington D.C. Ronald Reagan	5h 9m	Alaska Airlines	AS4
from $213 Find flight	22:05 Seattle Seattle-Tacoma Intl	06:02+1 день Washington D.C. Dulles International	4h 57m	United Airlines	UA2402
from $239 Find flight	13:00 Seattle Seattle-Tacoma Intl	20:57 Washington D.C. Dulles International	4h 57m	United Airlines	UA2275
from $126 Find flight	06:25 Seattle Seattle-Tacoma Intl	21:57 Washington D.C. Ronald Reagan	12h 32m layover 6h 14m - Denver	Frontier Airlines	F93406 F9690
from $187 Find flight	05:25 Seattle Seattle-Tacoma Intl	16:02 Washington D.C. Ronald Reagan	7h 37m layover 1h 40m - Portland	Hawaiian Airlines	HA6833 HA6710
from $209 Find flight	00:20 Seattle Seattle-Tacoma Intl	10:56 Washington D.C. Ronald Reagan	7h 36m layover 1h 32m - Chicago	United Airlines	UA1832 UA1010
from $209 Find flight	23:58 Seattle Seattle-Tacoma Intl	11:46+1 день Washington D.C. Ronald Reagan	8h 48m layover 1h 19m - Houston	United Airlines	UA2379 UA512
from $211 Find flight	09:12 Seattle Seattle-Tacoma Intl	09:23+1 день Washington D.C. Dulles International	21h 11m layover 5h 20m - Minneapolis 8h 52m - Fletcher	Sun Country Airlines	SY282 G4246 G4217
from $389 Find flight	08:55 Seattle Seattle-Tacoma Intl	21:42 Washington D.C. Ronald Reagan	9h 47m layover 0h 40m - Portland 0h 31m - Los Angeles	Alaska Airlines	AS2193 AS1143 AS6

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on July 25, 2025

Flight Schedule Seattle (Washington) to Washington D.C. (District of Columbia)

Full flight schedule will help you in detecting at what time planes fly from Seattle to Washington D.C.. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.

Departure	Flight Details	Flight Duration	Price
08:00 — 16:11	08:00 — 16:11 UA1873 United Airlines Seattle — Washington D.C.	5h 11m	Find flight from$213
08:34 — 16:43	08:34 — 16:43 AS4 Alaska Airlines Seattle — Washington D.C.	5h 9m	Find flight from$211
08:34 — 16:43	08:34 — 16:43 HA6704 Hawaiian Airlines Seattle — Washington D.C.	5h 9m	Find flight from$214
09:15 — 17:13	09:15 — 17:13 AS406 Alaska Airlines Seattle — Washington D.C.	4h 58m	Find flight from$206
13:00 — 20:57	13:00 — 20:57 UA2275 United Airlines Seattle — Washington D.C.	4h 57m	Find flight from$239
13:58 — 21:59	13:58 — 21:59 HA6702 Hawaiian Airlines Seattle — Washington D.C.	5h 1m	Find flight from$159
13:58 — 21:59	13:58 — 21:59 AS2 Alaska Airlines Seattle — Washington D.C.	5h 1m	Find flight from$164
15:59 — 23:59	15:59 — 23:59 AS348 Alaska Airlines Seattle — Washington D.C.	5h	Find flight from$140
22:05 — 06:02 +1 day	22:05 — 06:02 UA2402 United Airlines Seattle — Washington D.C.	4h 57m	Find flight from$213
23:20 — 07:17 +1 day	23:20 — 07:17 UA2211 United Airlines Seattle — Washington D.C.	4h 57m	Find flight from$211
23:30 — 07:27 +1 day	23:30 — 07:27 AS367 Alaska Airlines Seattle — Washington D.C.	4h 57m	Find flight from$163
23:30 — 07:27 +1 day	23:30 — 07:27 HA6718 Hawaiian Airlines Seattle — Washington D.C.	4h 57m	Find flight from$203
00:20 — 10:56	00:20 — 06:28 UA1832 United Airlines Seattle — Chicago 1h 32m stop 08:00 — 10:56 UA1010 United Airlines Chicago — Washington D.C.	7h 36m including layover	Find flight from$209
00:20 — 11:55	00:20 — 06:28 UA1832 United Airlines Seattle — Chicago 2h 24m stop 08:52 — 11:55 UA2277 United Airlines Chicago — Washington D.C.	8h 35m including layover	Find flight from$227
05:10 — 16:50	05:10 — 07:22 UA706 United Airlines Seattle — San Francisco 1h 8m stop 08:30 — 16:50 UA1678 United Airlines San Francisco — Washington D.C.	8h 40m including layover	Find flight from$230
05:25 — 16:02	05:20 — 06:17 HA6833 Hawaiian Airlines Seattle — Portland 1h 40m stop 08:00 — 16:06 HA6710 Hawaiian Airlines Portland — Washington D.C.	7h 37m including layover	Find flight from$187
06:00 — 16:18	06:00 — 12:07 AS408 Alaska Airlines Seattle — Chicago 1h 15m stop 13:22 — 16:18 AS4384 Alaska Airlines Chicago — Washington D.C.	7h 18m including layover	Find flight from$4915
06:25 — 21:57	06:25 — 10:16 F93406 Frontier Airlines Seattle — Denver 6h 14m stop 16:25 — 21:59 F9690 Frontier Airlines Denver — Washington D.C.	12h 32m including layover	Find flight from$126
10:56 — 21:02	10:56 — 17:05 UA265 United Airlines Seattle — Chicago 55m stop 18:00 — 21:02 UA1269 United Airlines Chicago — Washington D.C.	7h 6m including layover	Find flight from$346
10:56 — 20:55	10:56 — 17:05 UA265 United Airlines Seattle — Chicago 51m stop 17:56 — 20:55 UA2677 United Airlines Chicago — Washington D.C.	6h 59m including layover	Find flight from$529
12:49 — 00:45 +1 day	12:49 — 16:40 UA757 United Airlines Seattle — Denver 2h 37m stop 19:17 — 00:45 UA1704 United Airlines Denver — Washington D.C.	8h 56m including layover	Find flight from$285
14:24 — 00:45 +1 day	14:24 — 18:15 UA2859 United Airlines Seattle — Denver 1h 2m stop 19:17 — 00:45 UA1704 United Airlines Denver — Washington D.C.	7h 21m including layover	Find flight from$222
17:10 — 05:18 +1 day	17:10 — 19:26 UA2482 United Airlines Seattle — San Francisco 1h 44m stop 21:10 — 05:18 UA2725 United Airlines San Francisco — Washington D.C.	9h 8m including layover	Find flight from$328
09:12 — 09:23 +1 day	09:10 — 14:25 SY282 Sun Country Airlines Seattle — Minneapolis 5h 20m stop 19:50 — 23:08 G4246 Allegiant Air Minneapolis — Fletcher 8h 52m stop 08:00 — 09:23 G4217 Allegiant Air Fletcher — Washington D.C.	21h 11m including layover	Find flight from$211
17:14 — 08:22 +1 day	17:14 — 20:05 UA2397 United Airlines Seattle — Los Angeles 50m stop 20:55 — 05:08 UA2397 United Airlines Los Angeles — Newark 1h 51m stop 07:29 — 08:51 UA4434 United Airlines Newark — Washington D.C.	12h 8m including layover	Find flight from$630

Departure	Arrival	Flight Details	Flight Time	Price
		stop stop	including layover	Find flight from$

*Departure and arrival times - local. Updated on July 25, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from Seattle to Washington D.C. depends on and how to choose the most interesting flight option for you.

Distance between Seattle and Washington D.C. is 3735 miles. Time difference between the cities is 3h. Airplanes depart 00:20 to 23:59 from 3 Seattle airports and arrive 00:20 to 23:59 to 2 Washington D.C. airports. Average flight time is 4h 59m.

The fastest flight 4h 57m
Average flight time 4h 59m
The earliest flight 00:20
The latest flight 23:59
Distance 2321 ml

The cheapest months to travel to Washington D.C. are june (from 113 $), may (from 121 $), july (from 124 $).

The most expensive months are september (from 140 $), august (from 126 $), july (from 124 $).

What is the lowest airfare Seattle to Washington D.C.?

The cheapest plane ticket found by our users is $126. This airfare is for economy class on one-way F93406 flight by Frontier Airlines for August 15, 2025 which leaves Seattle-Tacoma Intl in Seattle at 06:25 am and arrives at Washington D.C. Ronald Reagan at 21:57.

Economy class

$126

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Business class

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First class

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Popular Airlines on the Route

The flight Seattle — Washington D.C. is served by 5 regular airlines and 2 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 9 departures per week at the price of from $ 140 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 5050.

Direct flights

There are 12 nonstop flights on the route. The fastest direct flight is AS367 by Alaska Airlines takes 4h 57m and the cheapest is F93406 by Frontier Airlines for $140.

AS - Alaska Airlines

from $140

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HA - Hawaiian Airlines

from $159

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UA - United Airlines

from $211

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Connecting Flights

There are 28 flights with layovers on the route. The fastest connecting flight is AS429 by Alaska Airlines takes 6h 52m and the cheapest is F93406 by Frontier Airlines for $126.

AS - Alaska Airlines

from $389

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F9 - Frontier Airlines

from $126

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SY - Sun Country Airlines

from $211

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HA - Hawaiian Airlines

from $187

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UA - United Airlines

from $209

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Airports

You can fly from Seattle to Washington D.C. from 3 airports (Boeing Field International Airport, Seattle-Tacoma Intl, Kenmore Air Harbor SPB).

Seattle airports

Boeing Field International Airport-BFI

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Seattle-Tacoma Intl-SEA

from $126
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Kenmore Air Harbor SPB-LKE

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Washington D.C. airports

Dulles International-IAD

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Ronald Reagan-DCA

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Airplanes

There are flights to Washington D.C. from Seattle by 5 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.

Top Domestic Destinations from Seattle

You may also consider searching for discounted plane tickets to some other popular places from Seattle within United States.

Seattle — Washington D.C.

from $78

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Seattle — New York

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Seattle — Chicago

from $73

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Seattle — San Diego

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Seattle — Los Angeles

from $53

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Seattle — Denver

from $243

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Seattle — Dallas

from $72

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Seattle — Boston

from $63

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Top International Destinations from Seattle

Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.

Seattle — Tokyo

from $77

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Seattle — London

from $70

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Seattle — Vancouver

from $57

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Seattle — Cancun

from $63

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Seattle — Paris

from $66

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Seattle — Toronto

from $64

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Seattle — Calgary

from $76

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Seattle — Mumbai

from $80

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Seattle — Montreal

from $68

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Seattle — Amsterdam

from $64

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How to book a plane ticket yourself?

Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.
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