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Cheap flights from Seattle to Washington, D.C. Reagan-National Airport from C$ 276

SEA — DCA
13 Oct — 20 Oct1
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

Fri 6/114:27 p.m. -
1 stop16h 42m
Wed 11/117:00 a.m. -
1 stop11h 12m
Deal found 11/9C$ 447
Fri 6/111:57 p.m. -
Nonstop5h 02m
Wed 11/117:00 a.m. -
1 stop11h 12m
Deal found 11/9C$ 509
Sat 5/128:00 a.m. -
Nonstop5h 08m
Wed 9/128:00 a.m. -
Nonstop5h 55m
Deal found 10/9C$ 523
Mon 9/117:20 a.m. -
Nonstop4h 53m
Sat 21/115:40 p.m. -
1 stop17h 41m
Deal found 9/9C$ 528
Sat 5/126:00 a.m. -
1 stop14h 05m
Tue 15/126:10 a.m. -
1 stop11h 53m
Deal found 10/9C$ 531
Sat 5/128:00 a.m. -
Nonstop5h 08m
Mon 14/1210:59 a.m. -
1 stop11h 53m
Deal found 10/9C$ 537
Tue 10/111:35 p.m. -
1 stop6h 51m
Sat 21/115:40 p.m. -
1 stop17h 41m
Deal found 9/9C$ 542
Mon 9/116:00 a.m. -
1 stop9h 38m
Fri 20/114:25 p.m. -
Nonstop6h 02m
Deal found 9/9C$ 544
Wed 14/108:00 a.m. -
Nonstop5h 25m
Tue 20/105:00 p.m. -
Nonstop5h 55m
Deal found 8/9C$ 545
Mon 26/1012:10 a.m. -
1 stop8h 45m
Fri 30/106:00 p.m. -
1 stop9h 40m
Deal found 8/9C$ 551

Find flight deals from Seattle to Reagan-National

Round-trip from

C$ 447

One-way from

C$ 276

Popular in

September

Cheapest in

January

Average price

C$ 870

Good round-trip deal

C$ 576 or less
Frontier
  • Frontier
  • 6/11-11/11
  • 2 total stops
  • 27h 54m total
  • Seattle to Washington, D.C.
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Alaska Airlines
  • Alaska Airlines
  • 12/11-31/12
  • 1 total stop
  • 11h 00m total
  • Seattle to Washington, D.C.
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Highest demand for flights based on searches. 15% potential increase in price (C$ 162 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 32 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Washington, D.C. Reagan-National.
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Cheapflights Fare Finder

 
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 Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National

SEADCA

Seattle/Tacoma Intl

Fri 6/11

12:15 a.m.-3:55 p.m.

1 stop12h 40m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 283

SeattleWashington, D.C.

SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National

SEADCA

Seattle/Tacoma Intl

Sat 14/11

5:30 a.m.-7:25 p.m.

2 stops10h 55m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 283

SeattleWashington, D.C.

SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National

SEADCA

Seattle/Tacoma Intl

Sat 10/10

1:49 p.m.-9:59 p.m.

Nonstop5h 10m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 290
Quickest round-trip

SeattleWashington, D.C.

SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National

SEADCA

Seattle/Tacoma Intl

Sun 1/11

7:20 a.m.-3:23 p.m.

Nonstop5h 03m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 338

SeattleWashington, D.C.

SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National

SEADCA

Seattle/Tacoma Intl

Wed 7/10

6:15 a.m.-10:55 p.m.

2 stops13h 40m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 348

SeattleWashington, D.C.

SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National

SEADCA

Seattle/Tacoma Intl

Sun 18/10

11:59 p.m.-12:46 p.m.

1 stop9h 47m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 352

SeattleWashington, D.C.

SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National

SEADCA

Seattle/Tacoma Intl

Mon 12/10

6:50 p.m.-8:30 a.m.

2 stops10h 40m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 352

SeattleWashington, D.C.

SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National

SEADCA

Seattle/Tacoma Intl

Fri 12/3

8:00 a.m.-4:08 p.m.

Nonstop5h 08m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 359

SeattleWashington, D.C.

SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National

SEADCA

Seattle/Tacoma Intl

Sun 6/12

7:00 a.m.-9:00 p.m.

1 stop11h 00m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 359

SeattleWashington, D.C.

SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National

SEADCA

Seattle/Tacoma Intl

Fri 5/3

8:00 a.m.-8:00 p.m.

1 stop9h 00m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 359

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 22 resultsSorted by cheapest first
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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

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?

The best time to book flights from Seattle to Washington, D.C. Reagan-National Airport is 80 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, January is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of C$ 415). Flying from Seattle to Washington, D.C. Reagan-National Airport in September is currently the most expensive (average of C$ 870). 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?

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.

How much does it cost to fly round-trip from Seattle to Washington, D.C. Reagan-National Airport?

Airfare is below average for this route at the moment.

Seattle to Washington, D.C. Reagan-National Airport flights typically cost between C$ 570 and C$ 1,092 in November.
The cheapest round-trip price found within the last 5 days was C$ 447 on Frontier (6 Nov-11 Nov).

Related info for your journey

  • 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 3 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$ 523, Alaska Airlines can have you in Washington, D.C. Reagan-National Airport from Seattle in 5h 08m. 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 (88%), Japan Airlines (58%) or Alaska Airlines (47%) 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$ 336. While the most popular route (Seattle/Tacoma Intl - Washington, D.C. Reagan-National) can be booked for C$ 509 on average, our data indicates C$ 592 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, January is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of C$ 415). Flying from Seattle to Washington, D.C. Reagan-National Airport in September is currently the most expensive (average of C$ 870). 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
Alexandria
Hanover
Oxon Hill
Gaithersburg
Reston
Herndon
Ellicott City
Arlington
Fredericksburg
Rockville

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Seattle to Reagan-National

Seattle to Dulles Intl flights

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