How long does a flight from Washington, D.C. to Seattle take?

Direct flights cover the 6,012 km separating Washington, D.C. to Seattle in about 5h 51m .

How many flights are there between Washington, D.C. Reagan-National Airport and Seattle per day?

Each day, there are 3 nonstop flights that take off from Washington, D.C. Reagan-National Airport and land in Seattle, with an average flight time of 5h 57m. The most common departure time is 4:00 p.m. and most flights take off in the afternoon. Each week, there are 21 flights and there are the same amount of flights each day (3).

How many flights are there between Washington, D.C. Reagan-National Airport and Seattle per day?

Each day, there are 3 nonstop flights that take off from Washington, D.C. Reagan-National Airport and land in Seattle, with an average flight time of 5h 57m. The most common departure time is 4:00 p.m. and most flights take off in the afternoon. Each week, there are 21 flights and there are the same amount of flights each day (3).

What’s the earliest departure time from Washington, D.C. to Seattle?

Early birds can take the earliest flight from Washington, D.C. Reagan-National Airport at 8:00 am and will be landing in Seattle at 10:54 am.

Which airlines offer Wi-Fi service onboard planes from Washington, D.C. to Seattle?

Alaska Airlines, Delta, JetBlue, and American Airlines offer inflight Wi-Fi service on the Washington, D.C. to Seattle flight route.

Which aircraft models fly most regularly from Washington, D.C. to Seattle?

The Boeing 737-800 Passenger/BBJ2 (winglets) is the aircraft model that flies most regularly on the Washington, D.C. to Seattle flight route.

On which days can I fly direct from Washington, D.C. to Seattle?

There are direct flights from Washington, D.C. to Seattle on a daily basis.

How does KAYAK find such low prices on flights from Washington, D.C. to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Seattle.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Washington, D.C. is likely to change within 7 days, so travellers know whether to wait or book now.

What is the Hacker Fare option on flights from Washington, D.C. to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Washington, D.C. with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Which cabin class options are there for flights between Washington, D.C. Reagan-National Airport and Seattle?

There are 2 cabin class options for the route. These are Economy and Prem Economy . Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Which cabin class options are there for flights between Washington, D.C. Reagan-National Airport and Seattle?

There are 2 cabin class options for the route. These are Economy and Prem Economy . Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Which airlines provide the cheapest flights from Washington, D.C. to Seattle?

In the past 5 days, the cheapest round-trip tickets from Washington, D.C. to Seattle were found on Southwest (C$ 424) and United Airlines (C$ 511).

Which airlines provide the cheapest flights from Washington, D.C. to Seattle?

In the past 5 days, the cheapest round-trip tickets from Washington, D.C. to Seattle were found on Southwest (C$ 424) and United Airlines (C$ 511).

C$ 240 CHEAP FLIGHTS from Washington, D.C. to Seattle (DCA - SEA)

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

C$ 424

Typical prices: C$ 460-C$ 774

Southwest

Fri 11/9Mon 14/9

DCA - SEA • 1 stop

Cheapest direct flights

C$ 465

Typical prices: C$ 503-C$ 838

Delta

Sat 12/9Fri 25/9

DCA - SEA • Direct

Advice from real travellers

AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.

DCA is easier than IAD and worth the higher fare for central Washington, D.C. trips.

On Alaska, pack light: overhead bin space fills fast on DCA-Seattle flights.

Expert advice

Direct flights

Every day

You can fly direct with Alaska Airlines and Delta. Average duration is 5h 57m

Direct flights

When to book

4 weeks

in advance

Our data shows that travellers who book at least 4 weeks in advance save around 50% compared to booking last minute.

Insights

When to travel

February

Cheapest • 35% price drop

August

Most popular

Good to know

Start a new search

KAYAK searches hundreds of sites at once to find you the best travel deals.

We hope you love your trip to Seattle!

Flight Deals

Cheap Flights from Washington, D.C. to Seattle (DCA-SEA)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Washington, D.C. to Seattle

Fri, 11 Sep - Mon, 14 Sep

6:40 p.m. - 11:55 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

8h 15m1 stop Chicago Midway

11:05 p.m. - 11:25 a.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

9h 20m1 stop Chicago Midway

C$ 424Southwest

Fri, 11 Sep - Tue, 15 Sep

4:55 p.m. - 12:45 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

10h 50m2 stops Omaha Eppley Airfield Phoenix Sky Harbor Intl

11:05 p.m. - 8:55 a.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

6h 50m1 stop Chicago Midway

C$ 431Southwest

Sat, 26 Sep - Wed, 30 Sep

3:40 p.m. - 8:55 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

8h 15m1 stop Chicago Midway

5:20 a.m. - 6:25 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

10h 05m2 stops Chicago Midway Nashville Intl

C$ 433Southwest

Tue, 15 Sep - Wed, 23 Sep

3:50 p.m. - 11:40 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

10h 50m2 stops Nashville Intl Chicago Midway

5:20 a.m. - 6:25 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

10h 05m2 stops Chicago Midway Nashville Intl

C$ 438Southwest

Sat, 12 Sep - Tue, 22 Sep

6:05 a.m. - 7:35 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

16h 30m2 stops Dallas Love Field Phoenix Sky Harbor Intl

11:00 p.m. - 12:05 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

10h 05m1 stop Nashville Intl

C$ 439Southwest

Wed, 28 Oct - Tue, 3 Nov

9:10 a.m. - 6:45 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

12h 35m2 stops Dallas Love Field Phoenix Sky Harbor Intl

9:15 a.m. - 9:55 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

9h 40m2 stops Austin Bergstrom Atlanta Hartsfield-Jackson

C$ 440Southwest

Sat, 26 Sep - Tue, 29 Sep

6:05 a.m. - 7:35 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

16h 30m2 stops Dallas Love Field Phoenix Sky Harbor Intl

5:20 a.m. - 6:25 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

10h 05m2 stops Chicago Midway Nashville Intl

C$ 449Southwest

Wed, 9 Sep - Thu, 17 Sep

3:50 p.m. - 11:40 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

10h 50m2 stops Nashville Intl Chicago Midway

5:15 a.m. - 2:50 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

6h 35m1 stop Chicago Midway

C$ 458Southwest

Sat, 12 Sep - Fri, 25 Sep

1:00 p.m. - 9:30 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

11h 30m2 stops Chicago Midway Denver Intl

12:05 p.m. - 10:55 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

7h 50m1 stop Lambert-St Louis

C$ 460Southwest

Fri, 11 Sep - Tue, 15 Sep

4:55 p.m. - 12:45 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

10h 50m2 stops Omaha Eppley Airfield Phoenix Sky Harbor Intl

5:20 a.m. - 6:25 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

10h 05m2 stops Chicago Midway Nashville Intl

C$ 465Southwest

Recent last minute flight deals from Washington, D.C. to Seattle

Mon, 17 Aug - Mon, 31 Aug

7:00 a.m. - 1:17 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

9h 17m1 stop Denver Intl

7:06 p.m. - 9:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

23h 53m1 stop Denver Intl

C$ 624Frontier

Tue, 18 Aug - Mon, 31 Aug

6:00 p.m. - 9:19 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

18h 19m1 stop Denver Intl

7:06 p.m. - 4:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

18h 53m1 stop Denver Intl

C$ 708Frontier

Wed, 19 Aug - Mon, 31 Aug

1:59 p.m. - 9:19 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

22h 20m1 stop Denver Intl

7:06 p.m. - 4:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

18h 53m1 stop Denver Intl

C$ 717Frontier

Mon, 17 Aug - Mon, 31 Aug

7:00 a.m. - 1:17 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

9h 17m1 stop Denver Intl

1:46 p.m. - 9:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 13mdirect

C$ 806Multiple Airlines

Mon, 17 Aug - Mon, 31 Aug

7:00 a.m. - 1:17 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

9h 17m1 stop Denver Intl

9:29 p.m. - 4:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

16h 30m2 stops Las Vegas Harry Reid Intl Denver Intl

C$ 828Frontier

Tue, 18 Aug - Mon, 31 Aug

6:00 p.m. - 9:19 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

18h 19m1 stop Denver Intl

9:29 p.m. - 4:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

16h 30m2 stops Las Vegas Harry Reid Intl Denver Intl

C$ 836Frontier

Tue, 18 Aug - Mon, 31 Aug

6:00 p.m. - 9:19 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

18h 19m1 stop Denver Intl

1:46 p.m. - 9:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 13mdirect

C$ 840Multiple Airlines

Thu, 20 Aug - Wed, 2 Sep

9:30 a.m. - 3:32 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

9h 02m1 stop Los Angeles

8:48 a.m. - 9:00 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

9h 12m1 stop San Diego

C$ 842Alaska Airlines

Sun, 16 Aug - Mon, 31 Aug

6:00 p.m. - 9:04 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

18h 04m1 stop Denver Intl

7:06 p.m. - 4:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

18h 53m1 stop Denver Intl

C$ 915Frontier

Wed, 19 Aug - Wed, 19 Aug

8:00 a.m. - 10:54 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 54mdirect

1:13 p.m. - 8:00 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

27h 47m1 stop Los Angeles

C$ 920Alaska Airlines

Recent direct flight deals from Washington, D.C. to Seattle

Sat, 12 Sep - Fri, 25 Sep

4:45 p.m. - 7:25 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 40mdirect

7:20 a.m. - 3:32 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 12mdirect

C$ 465Delta

Tue, 15 Sep - Wed, 23 Sep

5:00 p.m. - 7:51 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 51mdirect

1:46 p.m. - 9:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 13mdirect

C$ 524Alaska Airlines

Tue, 15 Sep - Sat, 19 Sep

5:00 p.m. - 7:51 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 51mdirect

1:46 p.m. - 9:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 13mdirect

C$ 539Alaska Airlines

Thu, 10 Sep - Thu, 17 Sep

5:00 p.m. - 7:51 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 51mdirect

1:46 p.m. - 9:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 13mdirect

C$ 570Alaska Airlines

Sat, 7 Nov - Sat, 7 Nov

8:00 a.m. - 10:55 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 55mdirect

1:57 p.m. - 9:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 02mdirect

C$ 572Alaska Airlines

Sun, 1 Nov - Sat, 7 Nov

8:00 a.m. - 10:55 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 55mdirect

1:57 p.m. - 9:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 02mdirect

C$ 579Alaska Airlines

Mon, 9 Nov - Thu, 12 Nov

5:11 p.m. - 8:13 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

6h 02mdirect

8:00 a.m. - 4:16 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 16mdirect

C$ 582Alaska Airlines

Mon, 9 Nov - Thu, 12 Nov

5:11 p.m. - 8:13 p.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

6h 02mdirect

8:00 a.m. - 4:16 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 16mdirect

C$ 583Alaska Airlines

Wed, 28 Oct - Sun, 1 Nov

8:00 a.m. - 10:59 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 59mdirect

1:57 p.m. - 9:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 02mdirect

C$ 588Alaska Airlines

Wed, 28 Oct - Sun, 1 Nov

8:00 a.m. - 10:59 a.m.DCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 59mdirect

1:57 p.m. - 9:59 p.m.SEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 02mdirect

C$ 592Alaska Airlines

Booking Insights

KAYAK's insights & trends for Washington, D.C. to Seattle flights

Get data-powered insights and trends into flights from Washington, D.C. to Seattle to help you find the cheapest flights, the best time to fly and much more.

Prices

Airlines

How much is a round-trip flight from Washington, D.C. Reagan-National Airport to Seattle?

Flight prices are below average for this route right now.

Flights to Seattle from Washington, D.C. Reagan-National Airport usually cost between C$ 456 and C$ 808 in September.
The lowest price found in the past 5 days was C$ 396 on Alaska Airlines (1 Sep–5 Sep).

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

The cheapest month for flights from Washington, D.C. Reagan-National Airport to Seattle is February, where tickets cost C$ 407 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is C$ 849 and C$ 820 respectively.

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

To get a below average price on the flight from Washington, D.C. Reagan-National Airport to Seattle, you should book around 4 weeks before departure, which saves you about 50% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Find deals

Expert advice

Our travel experts

Ramsey Qubein

Expert on DCA

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Harriet Baskas

Expert on SEA

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Low season	January
High season	August
Cheapest flight	C$ 240

Best time to beat the crowds (31% less expensive on average)

Most popular time to fly and prices are also 11% lower on average.

Flight from Washington, D.C. to Seattle

When to book flights from Washington, D.C. to Seattle

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

NguyenFlew with Delta-Dec 2025

DCA airport is much easier to navigate (security, getting to gate, proximity to DC city center) than IAD

ManojFlew with Alaska Airlines-Nov 2025

Don’t bring carry on roller luggage if you can avoid it. Overhead space runs out real quick.

PaulFlew with Alaska Airlines-Jun 2024

It's pricier to fly into Reagan (DCA), but if your destination is core DC area, it is well worth it. I used Ubers and Metro; no need to rent a car.

Verified travelerFlew with Alaska Airlines-Jul 2024

Be prepared Seattle is a mess as far as the overwhelming crowds when you land . The bus line to get your rental car is unbelievably long almost 100 people so be prepared once you arrive .

What is the cheapest flight from Washington, D.C. Reagan-National Airport to Seattle?
In the last 5 days, the lowest price for a flight from Washington, D.C. Reagan-National Airport to Seattle was C$ 240 for a one-way ticket and C$ 424 for a round-trip.
Which airlines offer Wi-Fi service onboard planes from Washington, D.C. to Seattle?
Alaska Airlines, Delta, JetBlue, and American Airlines offer inflight Wi-Fi service on the Washington, D.C. to Seattle flight route.
Which aircraft models fly most regularly from Washington, D.C. to Seattle?
The Boeing 737-800 Passenger/BBJ2 (winglets) is the aircraft model that flies most regularly on the Washington, D.C. to Seattle flight route.
On which days can I fly direct from Washington, D.C. to Seattle?
There are direct flights from Washington, D.C. to Seattle on a daily basis.
How does KAYAK find such low prices on flights from Washington, D.C. to Seattle?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Seattle.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Seattle?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Washington, D.C. is likely to change within 7 days, so travellers know whether to wait or book now.
What is the Hacker Fare option on flights from Washington, D.C. to Seattle?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Washington, D.C. with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Seattle?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Looking for a cheap flight? 25% of our users found flights on this route for C$ 417 or less one-way.

Direct departures

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

Monday

Alaska Airlines,Delta

Tuesday

Alaska Airlines,Delta

Wednesday

Alaska Airlines,Delta

Thursday

Alaska Airlines,Delta

Friday

Alaska Airlines,Delta

Saturday

Alaska Airlines,Delta

Sunday

Alaska Airlines,Delta

See more nonstop flights

Direct returns

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

Monday

Alaska Airlines,Delta

Tuesday

Alaska Airlines,Delta

Wednesday

Alaska Airlines,Delta

Thursday

Alaska Airlines,Delta

Friday

Alaska Airlines,Delta

Saturday

Alaska Airlines,Delta

Sunday

Alaska Airlines,Delta

See more nonstop flights

Everything you need to know for your flight from Washington, D.C. to Seattle

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

Washington, D.C. (DCA)

Seattle (SEA)

DCA - SEA

C$ 240 Find Cheap Flights from Washington, D.C. to Seattle – Compare and Save

Everything you should know

Cheap Flights from Washington, D.C. to Seattle (DCA-SEA)

Recent round-trip flight deals from Washington, D.C. to Seattle

Recent one-way flight deals from Washington, D.C. to Seattle

Recent last minute flight deals from Washington, D.C. to Seattle

Recent direct flight deals from Washington, D.C. to Seattle

KAYAK's insights & trends for Washington, D.C. to Seattle flights

How much is a round-trip flight from Washington, D.C. Reagan-National Airport to Seattle?

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

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

Which airlines provide the cheapest flights from Washington, D.C. to Seattle?

Which cabin class options are there for flights between Washington, D.C. Reagan-National Airport and Seattle?

How many flights are there between Washington, D.C. Reagan-National Airport and Seattle per day?

How long does a flight from Washington, D.C. to Seattle take?

What’s the earliest departure time from Washington, D.C. to Seattle?

What’s the latest departure time from Washington, D.C. to Seattle?

Expert advice for your flight from Washington, D.C. to Seattle

Good to know

Low season

High season

Cheapest flight

When to book flights from Washington, D.C. to Seattle

Flights from Washington, D.C. to Seattle: the best tips from KAYAK users' own experiences

FAQs for booking Washington, D.C. to Seattle flights

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Reagan-National Airport to Seattle

Prefer to fly direct from Washington, D.C. to Seattle?

Everything you need to know for your flight from Washington, D.C. to Seattle

Information on your arrival and departure airports

Cabin class types available on flights to Seattle

Complete your trip to Seattle with a hotel stay or car rental

Find direct flights to and from Washington, D.C. and Seattle

Flights to other popular destinations

Flights from domestic origins to Seattle

Choose which airport to fly into in Washington, D.C.

Find deals for your return flight