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

DCA — SEA
13 Oct — 20 Oct1
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

Mon 14/125:04 p.m. -
Nonstop6h 00m
Wed 6/11:59 p.m. -
Nonstop5h 00m
Deal found 8/9C$ 523
Wed 30/97:25 p.m. -
1 stop15h 30m
Mon 12/1011:10 p.m. -
1 stop16h 27m
Deal found 9/9C$ 531
Sat 5/128:00 a.m. -
Nonstop5h 55m
Sat 12/127:00 a.m. -
1 stop10h 00m
Deal found 11/9C$ 537
Tue 15/126:25 a.m. -
1 stop8h 19m
Tue 22/1211:44 p.m. -
1 stop7h 15m
Deal found 11/9C$ 551
Thu 12/116:00 p.m. -
1 stop24h 12m
Mon 16/114:27 p.m. -
1 stop26h 23m
Deal found 12/9C$ 553
Thu 15/106:00 p.m. -
1 stop9h 40m
Mon 19/106:50 p.m. -
2 stops10h 40m
Deal found 9/9C$ 558
Sat 3/1012:32 p.m. -
1 stop12h 33m
Sun 11/107:20 a.m. -
Nonstop5h 03m
Deal found 10/9C$ 562
Tue 20/105:00 p.m. -
Nonstop5h 55m
Sat 24/101:49 p.m. -
Nonstop5h 10m
Deal found 11/9C$ 563
Wed 28/109:10 a.m. -
2 stops12h 35m
Wed 4/119:15 a.m. -
2 stops11h 35m
Deal found 10/9C$ 565
Thu 15/106:00 p.m. -
1 stop9h 40m
Thu 22/106:15 a.m. -
2 stops13h 40m
Deal found 10/9C$ 566
Tue 27/108:00 a.m. -
Nonstop5h 59m
Fri 30/109:08 p.m. -
1 stop20h 52m
Deal found 10/9C$ 569
Mon 19/106:00 p.m. -
1 stop9h 40m
Sat 24/106:15 a.m. -
2 stops8h 45m
Deal found 8/9C$ 571

Find flight deals from Reagan-National to Seattle

Round-trip from

C$ 523

One-way from

C$ 276

Popular in

June

Cheapest in

February

Average price

C$ 651

Good one-way deal

C$ 417 or less
Alaska Airlines
  • Alaska Airlines
  • 14/12-6/1
  • Nonstop
  • 11h 00m total
  • Washington, D.C. to Seattle
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Alaska Airlines
  • Alaska Airlines
  • 11/12-31/12
  • 1 total stop
  • 11h 53m total
  • Washington, D.C. to Seattle
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 166 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 27 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 one-way 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.

Fly from

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

Thu 10/12

3:35 p.m.-11:30 p.m.

1 stop10h 55m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 276

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Tue 9/3

10:59 a.m.-7:52 p.m.

1 stop11h 53m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 290

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Mon 8/3

5:04 p.m.-8:04 p.m.

Nonstop6h 00m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 304

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Mon 14/12

5:04 p.m.-8:04 p.m.

Nonstop6h 00m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 304

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Fri 6/11

1:35 p.m.-10:10 p.m.

2 stops11h 35m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 311

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Mon 9/11

4:25 p.m.-7:27 p.m.

Nonstop6h 02m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 325
Quickest round-trip

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Fri 30/10

4:45 p.m.-7:35 p.m.

Nonstop5h 50m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 338

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Sat 3/10

12:35 p.m.-9:40 p.m.

2 stops12h 05m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 340

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Mon 19/10

4:45 p.m.-7:35 p.m.

Nonstop5h 50m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 352

Washington, D.C.Seattle

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

DCASEA

Washington, D.C. Reagan-National

Mon 8/3

2:40 p.m.-10:55 p.m.

2 stops11h 15m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 352

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

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 56 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$ 406). Flying from Washington, D.C. Reagan-National Airport to Seattle in June is currently the most expensive (average of C$ 846). 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 typical for this route at the moment.

Washington, D.C. Reagan-National Airport to Seattle flights typically cost between C$ 523 and C$ 949 in December.
The cheapest round-trip price found within the last 5 days was C$ 523 on Alaska Airlines (14 Dec-6 Jan).

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 2 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 5h 55m. Fly via 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: Japan Airlines (79%), Alaska Airlines (77%), Delta( 73%).

  • 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$ 439, our data indicates the cheapest price to be C$ 417. The most popular route (Washington, D.C. Reagan-National - Seattle/Tacoma Intl), is priced around C$ 659.

  • 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$ 406). Flying from Washington, D.C. Reagan-National Airport to Seattle in June is currently the most expensive (average of C$ 846). 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

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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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