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Cheap flights from Seattle to Washington, D.C. Reagan-National Airport from C$ 177

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DCA
15 Apr — 22 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Reagan-National

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Reagan-National
Explore the most affordable flight options available from Seattle to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 March 2026.

Wed 29/46:00 a.m.
SEA
-
DCA
2 stops9h 40m
Southwest
Mon 4/57:45 p.m.
DCA
-
SEA
1 stop7h 20m
Southwest
Deal found 14/3C$ 307
Wed 29/46:50 a.m.
SEA
-
DCA
2 stops11h 00m
Southwest
Wed 6/53:40 p.m.
DCA
-
SEA
2 stops10h 55m
Southwest
Deal found 15/3C$ 314
Thu 16/411:55 p.m.
SEA
-
DCA
1 stop11h 05m
Southwest
Wed 22/44:50 p.m.
DCA
-
SEA
2 stops10h 05m
Southwest
Deal found 14/3C$ 316
Fri 1/57:30 a.m.
SEA
-
DCA
Nonstop4h 57m
Delta
Sat 2/54:39 p.m.
DCA
-
SEA
Nonstop5h 51m
Delta
Deal found 14/3C$ 321
Wed 15/46:00 a.m.
SEA
-
DCA
2 stops9h 40m
Southwest
Mon 20/47:45 p.m.
DCA
-
SEA
2 stops15h 55m
Southwest
Deal found 13/3C$ 322
Wed 6/57:30 a.m.
SEA
-
DCA
Nonstop4h 57m
Delta
Sat 9/53:59 p.m.
DCA
-
SEA
1 stop8h 57m
Delta
Deal found 12/3C$ 327
Tue 28/47:00 a.m.
SEA
-
DCA
1 stop7h 04m
United Airlines
Thu 30/43:30 p.m.
DCA
-
SEA
1 stop10h 17m
United Airlines
Deal found 12/3C$ 328
Tue 28/411:45 p.m.
SEA
-
DCA
1 stop11h 35m
Southwest
Thu 30/47:45 p.m.
DCA
-
SEA
1 stop7h 20m
Southwest
Deal found 11/3C$ 329
Sat 25/411:11 p.m.
SEA
-
DCA
1 stop6h 26m
Delta
Wed 29/44:39 p.m.
DCA
-
SEA
Nonstop5h 51m
Delta
Deal found 14/3C$ 335
Tue 28/46:00 a.m.
SEA
-
DCA
2 stops9h 40m
Southwest
Wed 29/49:55 a.m.
DCA
-
SEA
2 stops10h 50m
Southwest
Deal found 11/3C$ 336
Fri 24/410:40 p.m.
SEA
-
DCA
1 stop8h 39m
Delta
Sat 2/56:05 a.m.
DCA
-
SEA
1 stop7h 50m
Delta
Deal found 11/3C$ 340
Wed 1/410:55 p.m.
SEA
-
DCA
1 stop8h 35m
United Airlines
Tue 14/42:00 p.m.
DCA
-
SEA
1 stop8h 00m
United Airlines
Deal found 11/3C$ 342

Find flight deals from Seattle to Reagan-National

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Reagan-National (DCA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 16 March 2026.

Round-trip from

C$ 307

One-way from

C$ 177

Popular in

November

Cheapest in

January

Average price

C$ 538

Good round-trip deal

C$ 670 or less
Southwest
  • Southwest
  • 6/5-13/5
  • 3 total stops
  • 19h 15m total
  • Seattle to Washington, D.C.
Search Deals
Delta
  • Delta
  • 16/5
  • 1 total stop
  • 8h 57m total
  • Seattle to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Washington, D.C. Reagan-National.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Reagan-National that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 16 March 2026.
Use the filters below to find and compare flights from Seattle to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 28/4

9:07 a.m.-9:00 p.m.

1 stop8h 53m

Washington, D.C. Reagan-National

Wed 29/4

8:59 a.m.-5:32 p.m.

1 stop11h 33m

C$ 421
Quickest round-trip

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 20/5

7:20 a.m.-3:30 p.m.

Nonstop5h 10m

Washington, D.C. Reagan-National

Tue 26/5

4:40 p.m.-7:24 p.m.

Nonstop5h 44m

C$ 438

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 30/4

5:15 a.m.-4:35 p.m.

1 stop8h 20m

Washington, D.C. Reagan-National

Mon 4/5

7:45 p.m.-8:40 a.m.

2 stops15h 55m

C$ 458

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 29/4

1:43 p.m.-9:59 p.m.

Nonstop5h 16m

Washington, D.C. Reagan-National

Sun 3/5

8:00 a.m.-10:57 a.m.

Nonstop5h 57m

C$ 471

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 6/5

1:43 p.m.-9:59 p.m.

Nonstop5h 16m

Washington, D.C. Reagan-National

Sat 9/5

8:59 a.m.-9:26 a.m.

1 stop27h 27m

C$ 487

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 30/4

11:59 p.m.-1:35 p.m.

1 stop10h 36m

Washington, D.C. Reagan-National

Wed 6/5

12:40 p.m.-11:29 p.m.

2 stops13h 49m

C$ 497

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 9/5

7:20 a.m.-3:30 p.m.

Nonstop5h 10m

Washington, D.C. Reagan-National

Sun 24/5

5:28 p.m.-10:48 p.m.

1 stop8h 20m

C$ 503

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 26/5

7:20 a.m.-3:30 p.m.

Nonstop5h 10m

Washington, D.C. Reagan-National

Sat 30/5

4:40 p.m.-7:24 p.m.

Nonstop5h 44m

C$ 531

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 6/6

7:20 a.m.-3:28 p.m.

Nonstop5h 08m

Washington, D.C. Reagan-National

Tue 9/6

4:40 p.m.-7:46 p.m.

Nonstop6h 06m

C$ 531

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sun 29/3

11:15 p.m.-11:34 a.m.

1 stop9h 19m

Washington, D.C. Reagan-National

Sat 4/4

4:40 p.m.-7:34 p.m.

Nonstop5h 54m

C$ 539

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/3

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from Seattle to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Washington, D.C. Reagan-National Airport

How far ahead should I book a flight from Seattle to Washington, D.C. Reagan-National Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Reagan-National. Price data was last updated on 13 March 2026.

The best time to book flights from Seattle to Washington, D.C. Reagan-National Airport is 59 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Washington, D.C. Reagan-National Airport?

Currently, February is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of C$ 169). Flying from Seattle to Washington, D.C. Reagan-National Airport in December is currently the most expensive (average of C$ 288). 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.

What is the cheapest time of day to fly from SEA to DCA?

Find hourly flight availability from Seattle to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 March 2026.

When flying from Seattle to Washington, D.C. Reagan-National Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Reagan-National. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Washington, D.C. Reagan-National?

    If you book a flight to Washington, D.C. Reagan-National from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 18.4 km from the centre of Seattle. There are 4 flights from Seattle/Tacoma Intl to Washington, D.C. Reagan-National per day from 0 different airlines.

  • How long is the flight from Seattle to Washington, D.C. Reagan-National Airport?

    For as low as C$ 314, Southwest can have you in Washington, D.C. Reagan-National Airport from Seattle in 8h 10m. There are 3735 km between Seattle and Washington, D.C. Reagan-National Airport. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most reliable airlines from Seattle to Washington, D.C. Reagan-National Airport?

    No one likes to see their flight delayed. When booking a flight from Seattle to Washington, D.C. Reagan-National Airport consider choosing Delta (92%), Alaska Airlines (73%) or Hawaiian Airlines (73%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Washington, D.C. Reagan-National Airport?

    Looking at all options, your cheapest flight can be booked for C$ 380. While the most popular route (Seattle/Tacoma Intl - Washington, D.C. Reagan-National) can be booked for C$ 579 on average, our data indicates C$ 1,694 when flying from Seattle to Washington, D.C. Reagan-National Airport.

  • Can I find deals for flights from Seattle to Reagan-National that include hotel bookings?

    Yes. In addition to deals on Seattle to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Reagan-National?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Reagan-National.

  • Can I find deals for business class flights from Seattle to Reagan-National?

    Yes. Cheapflights offers flight deals from Seattle to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Washington, D.C. Reagan-National Airport?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of C$ 169). Flying from Seattle to Washington, D.C. Reagan-National Airport in December is currently the most expensive (average of C$ 288). 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.

See more FAQs

Travelling to a place near Washington, D.C. Reagan-National Airport?

Book flights to Washington, D.C. Reagan-National Airport if you plan to visit one of these locations
Silver Spring
Hanover
Fairfax
Reston
Ellicott City
Oxon Hill
Gaithersburg
Arlington
Herndon
Manassas
Fredericksburg
Alexandria
Rockville

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Reagan-National

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Dulles Intl flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Reagan-National?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Seattle to Reagan-National. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Reagan-National?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Reagan-National.

Can Cheapflights find flights from Seattle to Reagan-National with no change fees?

Yes! Cheapflights helps users easily find flights from Seattle to Reagan-National with no change fees.

Can Cheapflights notify me if prices for flights from Seattle to Reagan-National become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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