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Cheap flights from Washington, D.C. Reagan-National Airport to Seattle from C$ 286

DCA — SEA
25 Nov — 2 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Reagan-National to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Reagan-National to Seattle

Thu 3/123:35 p.m. -
1 stop11h 00m
Thu 10/126:30 a.m. -
1 stop6h 45m
Deal found 21/10C$ 479
Thu 12/112:40 p.m. -
1 stop13h 05m
Wed 18/1111:20 a.m. -
1 stop9h 00m
Deal found 21/10C$ 487
Sat 5/129:25 a.m. -
1 stop10h 20m
Sat 12/126:45 a.m. -
2 stops10h 50m
Deal found 26/10C$ 510
Tue 8/122:40 p.m. -
2 stops11h 10m
Tue 15/129:10 a.m. -
2 stops11h 40m
Deal found 25/10C$ 517
Tue 10/113:35 p.m. -
1 stop11h 00m
Tue 17/116:30 a.m. -
1 stop6h 45m
Deal found 21/10C$ 527
Sat 5/125:05 p.m. -
Nonstop6h 17m
Sat 12/122:02 p.m. -
Nonstop4h 57m
Deal found 21/10C$ 528
Thu 3/123:35 p.m. -
1 stop11h 00m
Sun 6/126:15 a.m. -
2 stops10h 40m
Deal found 22/10C$ 534
Fri 4/122:40 p.m. -
2 stops11h 10m
Tue 8/126:30 a.m. -
1 stop6h 45m
Deal found 25/10C$ 538
Wed 9/124:00 p.m. -
2 stops9h 50m
Sun 13/126:25 p.m. -
2 stops10h 55m
Deal found 22/10C$ 541
Sat 5/1212:15 p.m. -
2 stops12h 35m
Tue 8/129:10 a.m. -
2 stops11h 40m
Deal found 23/10C$ 546

Find flight deals from Reagan-National to Seattle

Round-trip from

C$ 479

One-way from

C$ 286

Popular in

June

Cheapest in

February

Average price

C$ 793

Good round-trip deal

C$ 696 or less
Southwest
  • Southwest
  • 3/12-10/12
  • 2 total stops
  • 17h 45m total
  • Washington, D.C. to Seattle
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Southwest
  • Southwest
  • 12/1-31/12
  • 2 total stops
  • 12h 15m total
  • Washington, D.C. to Seattle
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 149 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 25 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Price to beat on a round-trip flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl.
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Seattle that are best for you.

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Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Mon 9/11

6:30 p.m.-12:45 a.m.

1 stop9h 15m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 287
Quickest round-trip

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Sat 5/12

5:05 p.m.-8:22 p.m.

Nonstop6h 17m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 293

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Tue 8/12

4:25 p.m.-7:45 p.m.

Nonstop6h 20m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 293

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Fri 29/1

2:35 p.m.-10:40 p.m.

1 stop11h 05m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 294

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Thu 12/11

2:40 p.m.-12:45 a.m.

1 stop13h 05m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 294

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Thu 31/12

8:00 a.m.-11:19 a.m.

Nonstop6h 19m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 321

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Mon 4/1

8:00 a.m.-11:19 a.m.

Nonstop6h 19m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 321

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Mon 4/1

7:30 p.m.-9:47 a.m.

2 stops17h 17m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 363

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Mon 23/11

3:35 p.m.-11:05 p.m.

2 stops10h 30m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 384

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Wed 25/11

9:00 p.m.-10:15 a.m.

2 stops16h 15m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 413

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/10

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Reagan-National to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Reagan-National with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

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

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

Booking 78 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Reagan-National Airport to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of C$ 405). Flying from Washington, D.C. Reagan-National Airport to Seattle in June is currently the most expensive (average of C$ 854). 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 DCA to SEA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Reagan-National Airport to Seattle as you normally would.

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

Airfare is below average for this route at the moment.

Washington, D.C. Reagan-National Airport to Seattle flights typically cost between C$ 532 and C$ 966 in December.
The cheapest round-trip price found within the last 5 days was C$ 479 on Southwest (3 Dec-10 Dec).

Related info for your journey

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

    Located just 18.4 km from the city centre, Seattle/Tacoma Intl is the airport most travellers will use when flying to Seattle from Washington, D.C. Reagan-National. Booking flights from Washington, D.C. Reagan-National to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 3 daily inbound flights from Washington, D.C. Reagan-National from 0 different airlines.

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

    There are many flights that can get you from Washington, D.C. Reagan-National Airport to Seattle in 6h 05m. Fly via Delta, Alaska Airlines, or Southwest to get the fastest option. Airlines will cover a distance of 3735 km. This flight may include one or multiple stops.

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

    Before booking your flight to Seattle from Washington, D.C. Reagan-National Airport, check out the most reliable airlines to get you to your destination on time: Finnair (92%), Japan Airlines (87%), Alaska Airlines( 83%).

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

    Looking for the cheapest flight from Washington, D.C. Reagan-National Airport to Seattle? While on average our users pay C$ 799, our data indicates the cheapest price to be C$ 665. The most popular route (Washington, D.C. Reagan-National - Seattle/Tacoma Intl), is priced around C$ 682.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Reagan-National to Seattle 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 Washington, D.C. Reagan-National Airport to Seattle?

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of C$ 405). Flying from Washington, D.C. Reagan-National Airport to Seattle in June is currently the most expensive (average of C$ 854). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Kent
Tukwila
Mukilteo
Ellensburg
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Marysville
Federal Way
Kirkland
Leavenworth

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Yes, Cheapflights offers price alerts on Reagan-National to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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