Cheap Flights from Seattle, WA to Washington D.C., DC from $106

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 $106, 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: $106 (one-way), $182 (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 $106. The fastest direct flight takes 4h 57m and the fastest connecting – 6h 52m.
Price Departure Arrival Flight Duration Airline Flight
from $132
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15:59
Seattle
Seattle-Tacoma Intl
 23:59
Washington D.C.
Dulles International
 5h 0m Alaska Airlines
AS348
from $148
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08:34
Seattle
Seattle-Tacoma Intl
 16:43
Washington D.C.
Ronald Reagan
 5h 9m Hawaiian Airlines
HA6704
from $152
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09:15
Seattle
Seattle-Tacoma Intl
 17:13
Washington D.C.
Dulles International
 4h 58m Alaska Airlines
AS406
from $106
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06:25
Seattle
Seattle-Tacoma Intl
 21:57
Washington D.C.
Ronald Reagan
 12h 32m
layover
6h 14m - Denver
 Frontier Airlines
F93406
F9690
from $176
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05:25
Seattle
Seattle-Tacoma Intl
 16:02
Washington D.C.
Ronald Reagan
 7h 37m
layover
1h 40m - Portland
 Hawaiian Airlines
HA6833
HA6710
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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on September 18, 2025
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 Arrival Flight Details Flight Duration Price
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$197
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$176
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
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from$106
08:00 — 16:11
08:00 — 16:11 UA1873 United Airlines
Seattle — Washington D.C.
5h 11m
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from$199
08:34 — 16:43
08:34 — 16:43 HA6704 Hawaiian Airlines
Seattle — Washington D.C.
5h 9m
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from$148
08:34 — 16:43
08:34 — 16:43 AS4 Alaska Airlines
Seattle — Washington D.C.
5h 9m
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from$153
09:15 — 17:13
09:15 — 17:13 AS406 Alaska Airlines
Seattle — Washington D.C.
4h 58m
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from$152
13:00 — 20:57
13:00 — 20:57 UA2275 United Airlines
Seattle — Washington D.C.
4h 57m
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from$198
13:58 — 21:59
13:58 — 21:59 HA6702 Hawaiian Airlines
Seattle — Washington D.C.
5h 1m
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from$149
13:58 — 21:59
13:58 — 21:59 AS2 Alaska Airlines
Seattle — Washington D.C.
5h 1m
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from$152
15:59 — 23:59
15:59 — 23:59 AS348 Alaska Airlines
Seattle — Washington D.C.
5h
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from$132
22:05 — 06:02
+1 day
22:05 — 06:02 UA2402 United Airlines
Seattle — Washington D.C.
4h 57m
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from$198
23:30 — 07:27
+1 day
23:30 — 07:27 HA6718 Hawaiian Airlines
Seattle — Washington D.C.
4h 57m
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from$149
23:30 — 07:27
+1 day
23:30 — 07:27 AS367 Alaska Airlines
Seattle — Washington D.C.
4h 57m
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from$153
23:58 — 11:46
+1 day
23:58 — 06:16 UA2379 United Airlines
Seattle — Houston
1h 19m stop
07:35 — 11:46 UA512 United Airlines
Houston — Washington D.C.
8h 48m
including layover
Find flight
from$197
*Departure and arrival times - local. Updated on September 18, 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 106 $), may (from 114 $), july (from 116 $).

The most expensive months are september (from 132 $), august (from 118 $), july (from 116 $).

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

The cheapest plane ticket found by our users is $106. This airfare is for economy class on one-way F93406 flight by Frontier Airlines for July 31, 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
$106
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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 $ 132 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 4742.

Direct flights

There are 12 nonstop flights on the route. The fastest direct flight is HA6718 by Hawaiian Airlines takes 4h 57m and the cheapest is F93406 by Frontier Airlines for $132.

  • AS - Alaska Airlines
    from $132
    Find
  • HA - Hawaiian Airlines
    from $148
    Find
  • UA - United Airlines
    from $198
    Find
See more direct flights

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 $106.

  • AS - Alaska Airlines
    from $366
    Find
  • F9 - Frontier Airlines
    from $106
    Find
  • SY - Sun Country Airlines
    from $199
    Find
  • HA - Hawaiian Airlines
    from $176
    Find
  • UA - United Airlines
    from $197
    Find
See more connecting flights

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 $106
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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.

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.

How to book a plane ticket yourself?

How to book an air 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.

    To find a plane ticket, please select dates.

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