Cheap Flights from Seattle, WA to Washington D.C., DC from $80

On Cheapflightsplus.com you will find 22 direct and 252 connecting flights from Seattle to Washington D.C.. You can compare airfare deals from 7 airlines and multiple travel sites from $80, 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.

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 5h 1m.

  • The fastest flight 4h 57m
  • Average flight time 5h 1m
  • The earliest flight 00:20
  • The latest flight 23:59
  • Distance 2321 ml

The cheapest months to travel to Washington D.C. are october (from 80 $), december (from 80 $), november (from 88 $).

The most expensive months are september (from 133 $), august (from 119 $), july (from 117 $).

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

The cheapest plane ticket found by our users is $80. This airfare is for economy class on one-way F93406 flight by Frontier Airlines for October 30, 2025 which leaves Seattle-Tacoma Intl in Seattle at 06:25 am and arrives at Washington D.C. Ronald Reagan at 16:57.

Economy class
$80
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Business class
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First class
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Flight Schedule Seattle (Washington) to Washington D.C. (District of Columbia)

06:25 — 16:57
7h 32m flight time
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from$80
09:19 — 13:04 Seattle — Denver
F93406 Frontier Airlines
1h 18m stop
11:40 — 16:59 Denver — Washington D.C.
F9688 Frontier Airlines
06:25 — 21:57
12h 32m flight time
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from$107
06:25 — 10:16 Seattle — Denver
F93406 Frontier Airlines
6h 14m stop
16:25 — 21:59 Denver — Washington D.C.
F9690 Frontier Airlines
08:34 — 16:43
5h 9m flight time
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from$149
Seattle — Washington D.C.
HA6704 Hawaiian Airlines
08:34 — 16:43
5h 9m flight time
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from$154
Seattle — Washington D.C.
AS4 Alaska Airlines
09:05 — 17:09
5h 4m flight time
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from$153
Seattle — Washington D.C.
AS401 Alaska Airlines
09:15 — 17:13
4h 58m flight time
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from$153
Seattle — Washington D.C.
AS406 Alaska Airlines
09:18 — 17:15
4h 57m flight time
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from$153
Seattle — Washington D.C.
AS408 Alaska Airlines
13:58 — 21:59
5h 1m flight time
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from$149
Seattle — Washington D.C.
HA6702 Hawaiian Airlines
13:58 — 21:59
5h 1m flight time
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from$153
Seattle — Washington D.C.
AS2 Alaska Airlines
15:59 — 23:59
5h flight time
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from$133
Seattle — Washington D.C.
AS348 Alaska Airlines
16:00 — 23:59
4h 59m flight time
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from$149
Seattle — Washington D.C.
HA6717 Hawaiian Airlines
20:01 — 12:04+1day
13h 3m flight time
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from$107
19:10 — 23:12 Seattle — Denver
F91176 Frontier Airlines
6h 46m stop
06:40 — 12:07 Denver — Washington D.C.
F9686 Frontier Airlines
22:55 — 06:58+1day
5h 3m flight time
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from$180
Seattle — Washington D.C.
UA684 United Airlines
23:30 — 07:27+1day
4h 57m flight time
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from$149
Seattle — Washington D.C.
HA6718 Hawaiian Airlines
23:30 — 07:36+1day
5h 6m flight time
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from$153
Seattle — Washington D.C.
AS307 Alaska Airlines
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 and arrival times - local. Updated on October 23, 2025.

Popular Airlines on the Route

The flight Seattle — Washington D.C. is served by 7 regular airlines and 3 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 39 departures per week at the price of from $ 133 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 4942.

Direct flights

There are 22 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 $133.

  • AS - Alaska Airlines
    from $133
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  • HA - Hawaiian Airlines
    from $149
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  • UA - United Airlines
    from $178
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Connecting Flights

There are 252 flights with layovers on the route. The fastest connecting flight is UA747 by United Airlines takes 6h 33m and the cheapest is F93406 by Frontier Airlines for $80.

  • AS - Alaska Airlines
    from $142
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  • F9 - Frontier Airlines
    from $80
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  • SY - Sun Country Airlines
    from $158
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  • TK - Turkish Airlines
    from $1135
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  • HA - Hawaiian Airlines
    from $135
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  • UA - United Airlines
    from $188
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  • NK - Spirit Airlines
    from $183
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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 $80
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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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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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