Southwest Airlines Seattle to Washington D.C. Flights

Cheapflightsplus.com will find cheap Southwest Airlines flights from Seattle to Washington D.C.. Compare airline ticket prices and book air tickets starting from $144 from trusted online travel agencies, web sites and directly from airlines. Check flights schedule of Southwest Airlines, arrivals and departure details below.

Find Cheap Airfare Seattle (WA) — Washington D.C. (DC) by Southwest Airlines

To find cheap tickets choose a day of your departure with attractive price on the graph below and click «Find flights». For round trip flights please click «Check prices for return flight». The cheapest airfare is in october: one-way - $144, two-way – $247.
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Below is a detailed 2022 flight schedule for today, tomorrow and all other days. It may vary depending on season and a day of the week of your desired trip. We recommend booking your itinerary at least 2 weeks prior your travel to get the best price and availability by the airline.
Departure Arrival Flight Details Flight Time Price
10:05 am — 10:30 pm
10:05 am — 1:50 pm WN1436 Southwest Airlines
Seattle — Denver
3h 25m stop
5:15 pm — 10:30 pm WN618 Southwest Airlines
Denver — Washington D.C.
9h 25m
including layover
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from$144
11:55 am — 9:55 pm
11:55 am — 6:00 pm WN378 Southwest Airlines
Seattle — Chicago
1h 5m stop
7:05 pm — 9:55 pm WN1288 Southwest Airlines
Chicago — Washington D.C.
7h
including layover
Find flight
from$296
6:15 pm — 12:23 pm
+1 day
6:15 pm — 9:50 pm WN1565 Southwest Airlines
Seattle — Denver
9h 10m stop
7:00 am — 12:23 pm F9534 Frontier Airlines
Denver — Washington D.C.
15h 8m
including layover
Find flight
from$176
7:00 am — 6:05 pm
7:00 am — 1:00 pm WN1613 Southwest Airlines
Seattle — Chicago
2h 15m stop
3:15 pm — 6:05 pm WN568 Southwest Airlines
Chicago — Washington D.C.
8h 5m
including layover
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from$144
8:30 am — 7:33 pm
8:30 am — 12:15 pm WN480 Southwest Airlines
Seattle — Denver
2h stop
2:15 pm — 7:33 pm UA461 United Airlines
Denver — Washington D.C.
8h 3m
including layover
Find flight
from$372
9:25 am — 6:45 pm
9:25 am — 3:15 pm WN1866 Southwest Airlines
Seattle — Lake Saint Louis
35m stop
3:50 pm — 6:45 pm WN309 Southwest Airlines
Lake Saint Louis — Washington D.C.
6h 20m
including layover
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from$325
2:45 pm — 7:45 am
+1 day
2:45 pm — 6:25 pm WN1350 Southwest Airlines
Seattle — Denver
1h 30m stop
7:55 pm — 0:40 am WN443 Southwest Airlines
Denver — Cleveland
5h 56m stop
6:36 am — 7:45 am AA5301 American Airlines
Cleveland — Washington D.C.
14h
including layover
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from$252
4:05 pm — 9:35 am
+1 day
4:05 pm — 6:40 pm WN998 Southwest Airlines
Seattle — Las Vegas
2h 51m stop
9:31 pm — 5:27 am B61078 JetBlue
Las Vegas — Boston
2h 33m stop
8:00 am — 9:35 am B6389 JetBlue
Boston — Washington D.C.
14h 30m
including layover
Find flight
from$518
*Departure and arrival times are local. Last updated on 09/29/2022

Flight Information

There are 25 flights by Southwest Airlines from Seattle to Washington D.C. every week with departures from Seattle-Tacoma Intl, Boeing Field International Airport, Kenmore Air Harbor SPB. All flights arrive at Ronald Reagan and Dulles International.

Departures start from 10:05 am to 9:25 am. Nonstop flight is 6h 20m. The time difference between Seattle and Washington D.C. is 3h.

  • The fastest flight 6h 20m
  • Average flight time 13h 29m
  • The earliest flight 10:05 am
  • The latest flight 9:25 am
  • Distance 2321 ml

The cheapest flight by Southwest Airlines that our users were able to find is $144. This airfare is economy class on one-way WN1613 flight for August 25, 2020 leaving Seattle-Tacoma Intl in Seattle at 7:00 am, it includes all taxes and additional fees.

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Other Popular Airlines on the Route

Besides Southwest Airlines there are other 7 airline carriers between Seattle and Washington D.C.. Please review schedules and prices from the most popular airlines to find the best airfare deals from Seattle to Washington D.C..

Nonstop flights

There are 7 direct flights every day from Seattle. Airlines and fares are below:

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Connecting Flights

List of flights with layovers (1 and more stops):

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How to book an air 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 airfare.
  • 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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