How long is the flight from Seattle to Washington, D.C.?

Southwest, Alaska Airlines, and Delta can get you from Seattle to Washington, D.C. in just under 4h 55m. Your travel time can differ by up to 2h 11m. The distance between Seattle and Washington, D.C. is about 3700 km. This flight may include one or multiple stops.

What is the cheapest airline to fly from Seattle to Washington, D.C. round-trip?

Currently priced at C$ 224, Alaska Airlines will fly you from Seattle to Washington, D.C. and back. In addition to Alaska Airlines, many other airlines offer competitively priced options for your trip. This flight start at 63% lower than the current average price 3 months from now.

In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 mm per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

What are the cheapest flights from Seattle to Washington, D.C.?

Looking for the cheapest flight from Seattle to Washington, D.C.? While on average our users pay C$ 1,194, our data indicates the cheapest price to be C$ 224. The most popular route (Seattle/Tacoma Intl - Washington, D.C. Dulles Intl), is priced around C$ 933.

What are the most reliable airlines from Seattle to Washington, D.C.?

Before booking your flight to Washington, D.C. from Seattle, check out the most reliable airlines to get you to your destination on time: Atlas Air (100%), Iberia (100%), Avianca( 96%).

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

Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Seattle/Tacoma Intl; the airport handles an average of 20 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Seattle airport to Washington, D.C.. It is only a 18.4 km journey to Seattle/Tacoma Intl (SEA) from Seattle’s city centre.

Can I find deals for flights from Seattle to Washington, D.C. that include hotel bookings?

Yes. In addition to deals on Seattle to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Seattle to Washington, D.C.?

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

Can I find deals for business class flights from Seattle to Washington, D.C.?

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

C$ 182+ Cheap Flights from Seattle to Washington, D.C.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Washington, D.C. are usually found in January or September, booked 34 days in advance, depart on a Tuesday or Friday and return on a Tuesday

Cheap flight deals from Seattle to Washington, D.C.

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from Seattle to Washington, D.C.
Explore the most affordable flight options available from Seattle to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 October 2026.

Wed 18/116:30 a.m. -

2 stops8h 05m

Wed 25/115:40 p.m. -

1 stop11h 05m

Deal found 19/10C$ 471

Wed 11/114:40 p.m. -

2 stops15h 25m

Mon 16/115:50 p.m. -

1 stop8h 45m

Deal found 19/10C$ 478

Wed 9/126:30 a.m. -

2 stops8h 05m

Tue 5/16:15 a.m. -

1 stop15h 50m

Deal found 18/10C$ 479

Fri 6/114:27 p.m. -

1 stop16h 42m

Wed 11/117:00 a.m. -

1 stop11h 12m

Deal found 17/10C$ 481

Fri 25/129:25 a.m. -

1 stop9h 25m

Wed 6/13:15 p.m. -

1 stop10h 20m

Deal found 16/10C$ 482

Wed 4/116:00 a.m. -

1 stop7h 51m

Mon 9/117:15 a.m. -

1 stop10h 40m

Deal found 16/10C$ 483

Sun 15/1112:15 a.m. -

1 stop8h 45m

Wed 18/113:35 p.m. -

1 stop11h 00m

Deal found 19/10C$ 483

Wed 16/124:40 p.m. -

2 stops15h 25m

Sun 20/125:40 p.m. -

2 stops10h 40m

Deal found 19/10C$ 485

Fri 13/117:55 p.m. -

1 stop7h 05m

Sun 15/117:01 a.m. -

1 stop8h 28m

Deal found 19/10C$ 486

Tue 1/126:00 a.m. -

1 stop9h 29m

Sat 5/127:00 a.m. -

1 stop10h 38m

Deal found 16/10C$ 488

Thu 15/102:10 p.m. -

1 stop7h 00m

Tue 20/106:15 a.m. -

2 stops10h 20m

Deal found 14/10C$ 490

Tue 17/114:40 p.m. -

2 stops10h 05m

Sat 21/116:15 a.m. -

1 stop9h 40m

Deal found 19/10C$ 492

Best flights from Seattle to Washington, D.C.
Discover carefully curated flight deals from Seattle to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 19 October 2026.

Mon 30/1112:15 a.m. -

1 stop7h 00m

Thu 10/124:00 p.m. -

2 stops9h 50m

Deal found 19/10C$ 492

Sat 21/119:45 p.m. -

Nonstop4h 55m

Tue 24/117:00 a.m. -

Nonstop5h 50m

Deal found 17/10C$ 533

Fri 4/127:54 p.m. -

1 stop7h 06m

Sat 5/126:32 p.m. -

1 stop8h 23m

Deal found 18/10C$ 561

Fri 4/127:00 a.m. -

1 stop8h 23m

Sun 6/125:55 p.m. -

Nonstop6h 06m

Deal found 14/10C$ 604

Thu 12/117:30 a.m. -

2 stops11h 25m

Thu 19/1110:50 a.m. -

1 stop10h 50m

Deal found 15/10C$ 509

Fri 13/1112:15 a.m. -

2 stops9h 15m

Sat 21/117:10 p.m. -

1 stop8h 35m

Deal found 15/10C$ 527

Thu 3/129:40 p.m. -

Nonstop4h 57m

Thu 10/127:00 a.m. -

Nonstop6h 11m

Deal found 19/10C$ 589

Fri 4/127:20 a.m. -

Nonstop4h 46m

Sun 6/124:25 p.m. -

Nonstop6h 20m

Deal found 14/10C$ 589

Sun 20/129:39 p.m. -

Nonstop5h 02m

Fri 25/127:01 a.m. -

Nonstop6h 12m

Deal found 17/10C$ 589

Thu 5/1112:15 a.m. -

1 stop7h 05m

Wed 11/1112:10 p.m. -

1 stop9h 25m

Deal found 17/10C$ 561

Sat 14/1111:55 a.m. -

Nonstop4h 59m

Sat 21/117:00 a.m. -

Nonstop6h 05m

Deal found 16/10C$ 632

Sat 19/121:59 p.m. -

Nonstop5h 00m

Wed 23/125:00 p.m. -

Nonstop6h 10m

Deal found 17/10C$ 589

Tue 10/114:40 p.m. -

2 stops10h 05m

Sat 14/116:10 a.m. -

2 stops12h 55m

Deal found 16/10C$ 575

Sat 5/127:20 a.m. -

Nonstop4h 46m

Sat 12/123:00 p.m. -

1 stop8h 49m

Deal found 18/10C$ 633

Thu 10/128:15 a.m. -

Nonstop5h 00m

Thu 17/127:05 a.m. -

Nonstop5h 55m

Deal found 17/10C$ 589

Mon 16/1110:40 p.m. -

1 stop7h 29m

Wed 25/117:00 a.m. -

Nonstop6h 05m

Deal found 19/10C$ 646

Sat 7/1110:40 a.m. -

1 stop10h 00m

Tue 10/1112:10 p.m. -

1 stop9h 25m

Deal found 18/10C$ 596

Wed 9/128:09 p.m. -

1 stop18h 30m

Wed 23/127:05 a.m. -

Nonstop5h 55m

Deal found 16/10C$ 646

Mon 16/1112:00 p.m. -

1 stop9h 41m

Tue 17/117:00 a.m. -

Nonstop6h 05m

Deal found 14/10C$ 660

Fri 4/129:25 a.m. -

2 stops9h 35m

Sun 6/128:00 a.m. -

2 stops14h 15m

Deal found 14/10C$ 611

Sun 22/114:30 p.m. -

Nonstop4h 50m

Tue 1/127:06 p.m. -

1 stop7h 47m

Deal found 16/10C$ 660

Mon 21/129:45 p.m. -

Nonstop5h 00m

Sat 2/17:05 a.m. -

Nonstop5h 55m

Deal found 19/10C$ 660

Mon 30/118:40 p.m. -

1 stop12h 35m

Mon 7/129:45 a.m. -

2 stops11h 05m

Deal found 16/10C$ 626

Mon 8/23:55 p.m. -

Nonstop4h 56m

Thu 11/27:05 a.m. -

Nonstop6h 00m

Deal found 19/10C$ 673

Fri 6/119:41 p.m. -

Nonstop4h 59m

Wed 11/117:02 a.m. -

Nonstop5h 54m

Deal found 17/10C$ 688

Tue 17/111:50 p.m. -

1 stop6h 31m

Thu 26/117:00 a.m. -

Nonstop6h 05m

Deal found 19/10C$ 674

Thu 12/118:07 a.m. -

Nonstop5h 07m

Thu 19/117:46 a.m. -

Nonstop5h 50m

Deal found 15/10C$ 717

Thu 12/115:15 a.m. -

2 stops9h 45m

Thu 19/119:00 a.m. -

2 stops11h 50m

Deal found 15/10C$ 719

Mon 8/26:05 a.m. -

1 stop9h 11m

Thu 11/24:40 p.m. -

Nonstop6h 05m

Deal found 19/10C$ 710

Wed 11/118:03 a.m. -

1 stop8h 57m

Wed 18/118:00 a.m. -

Nonstop5h 55m

Deal found 14/10C$ 731

Find flight deals from Seattle to Washington, D.C.

Round-trip from	C$ 471
One-way from	C$ 182
Popular in	June
Cheapest in	January
Average price	C$ 632
Good round-trip deal	C$ 1,973 or less
Good one-way deal	C$ 224 or less

Southwest
18/11-25/11
3 total stops
19h 10m total
Seattle to Washington, D.C.

Search Deals

Delta
17/11-31/12
1 total stop
9h 01m total
Seattle to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (C$ 99 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 October 2026

Search Deals

Price to beat on a round-trip flight from Seattle/Tacoma Intl to Washington, D.C. (WAS).

Search Deals

Price to beat on a one-way flight from Seattle/Tacoma Intl to Washington, D.C. (WAS).

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBaltimore

SEA Seattle/Tacoma Intl - BWI Baltimore/Washington

SEABWI

Seattle/Tacoma Intl

Thu 3/12

9:40 p.m.-5:37 a.m.

Nonstop4h 57m

Baltimore/Washington

Wed 31/12

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

Nonstop0h 00m

C$ 216

SeattleBaltimore

SEA Seattle/Tacoma Intl - BWI Baltimore/Washington

SEABWI

Seattle/Tacoma Intl

Fri 27/11

6:00 a.m.-4:49 p.m.

1 stop7h 49m

Baltimore/Washington

Wed 31/12

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

Nonstop0h 00m

C$ 281

SeattleBaltimore

SEA Seattle/Tacoma Intl - BWI Baltimore/Washington

SEABWI

Seattle/Tacoma Intl

Tue 1/12

6:30 p.m.-5:35 a.m.

1 stop8h 05m

Baltimore/Washington

Wed 31/12

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

Nonstop0h 00m

C$ 281

SeattleBaltimore

SEA Seattle/Tacoma Intl - BWI Baltimore/Washington

SEABWI

Seattle/Tacoma Intl

Tue 1/12

9:40 p.m.-5:37 a.m.

Nonstop4h 57m

Baltimore/Washington

Wed 31/12

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

Nonstop0h 00m

C$ 281

SeattleWashington, D.C.

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

SEADCA

Seattle/Tacoma Intl

Mon 30/11

12:15 a.m.-10:15 a.m.

1 stop7h 00m

Washington, D.C. Reagan-National

Wed 31/12

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

Nonstop0h 00m

C$ 281

SeattleBaltimore

SEA Seattle/Tacoma Intl - BWI Baltimore/Washington

SEABWI

Seattle/Tacoma Intl

Mon 23/11

9:25 p.m.-1:35 p.m.

1 stop13h 10m

Baltimore/Washington

Wed 31/12

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

Nonstop0h 00m

C$ 288

SeattleWashington, D.C.

SEA Seattle/Tacoma Intl - IAD Washington, D.C. Dulles Intl

SEAIAD

Seattle/Tacoma Intl

Tue 1/12

8:09 p.m.-5:39 p.m.

1 stop18h 30m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop0h 00m

C$ 288

SeattleWashington, D.C.

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

SEADCA

Seattle/Tacoma Intl

Thu 19/11

6:30 a.m.-4:15 p.m.

1 stop6h 45m

Washington, D.C. Reagan-National

Wed 31/12

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

Nonstop0h 00m

C$ 288

SeattleBaltimore

SEA Seattle/Tacoma Intl - BWI Baltimore/Washington

SEABWI

Seattle/Tacoma Intl

Mon 15/3

5:30 a.m.-6:20 p.m.

2 stops9h 50m

Baltimore/Washington

Wed 31/12

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

Nonstop0h 00m

C$ 290

SeattleWashington, D.C.

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

SEADCA

Seattle/Tacoma Intl

Wed 25/11

7:20 a.m.-3:13 p.m.

Nonstop4h 53m

Washington, D.C. Reagan-National

Wed 31/12

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

Nonstop0h 00m

C$ 295

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/10

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from Seattle to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Seattle with our price prediction graph.

SEA-WAS

SEA-BWI

SEA-DCA

SEA-IAD

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.

SEA-WAS

SEA-BWI

SEA-DCA

SEA-IAD

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of C$ 513). Flying from Seattle to Washington, D.C. in June is currently the most expensive (average of C$ 742). 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 WAS?

Unlike in the morning, when flights are generally more expensive, you can save up to 51% on flights from Seattle to Washington, D.C. by exploring options for tickets at noon.

Weekly flight availability from Seattle to Washington, D.C.

The most flights from SEA to WAS are scheduled on a Friday (26 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (16 on average).

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

Airfare is below average for this route at the moment.

Seattle to Washington, D.C. flights typically cost between C$ 533 and C$ 844 in November.
The cheapest round-trip price found within the last 5 days was C$ 471 on Southwest (18 Nov-25 Nov).

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

Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Washington, D.C.

Read through reviews of airlines operating flights from Seattle to Washington, D.C., such as Alaska Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

7.9

Good

13,087 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Alaska Airlines

7.9

Good

13,087 reviews

Alaska Airlines

7.9

Good

13,087 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Related info for your journey

What airport do you fly from for flights from Seattle to Washington, D.C.?
Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Seattle/Tacoma Intl; the airport handles an average of 20 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Seattle airport to Washington, D.C.. It is only a 18.4 km journey to Seattle/Tacoma Intl (SEA) from Seattle’s city centre.
How long is the flight from Seattle to Washington, D.C.?
Southwest, Alaska Airlines, and Delta can get you from Seattle to Washington, D.C. in just under 4h 55m. Your travel time can differ by up to 2h 11m. The distance between Seattle and Washington, D.C. is about 3700 km. This flight may include one or multiple stops.
What is the cheapest airline to fly from Seattle to Washington, D.C. round-trip?
Currently priced at C$ 224, Alaska Airlines will fly you from Seattle to Washington, D.C. and back. In addition to Alaska Airlines, many other airlines offer competitively priced options for your trip. This flight start at 63% lower than the current average price 3 months from now.
What are the most reliable airlines from Seattle to Washington, D.C.?
Before booking your flight to Washington, D.C. from Seattle, check out the most reliable airlines to get you to your destination on time: Atlas Air (100%), Iberia (100%), Avianca( 96%).
What are the cheapest flights from Seattle to Washington, D.C.?
Looking for the cheapest flight from Seattle to Washington, D.C.? While on average our users pay C$ 1,194, our data indicates the cheapest price to be C$ 224. The most popular route (Seattle/Tacoma Intl - Washington, D.C. Dulles Intl), is priced around C$ 933.
Can I find deals for flights from Seattle to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Seattle to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Seattle to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Washington, D.C..
Can I find deals for business class flights from Seattle to Washington, D.C.?
Yes. Cheapflights offers flight deals from Seattle to Washington, D.C. 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.?
Currently, January is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of C$ 513). Flying from Seattle to Washington, D.C. in June is currently the most expensive (average of C$ 742). 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

Silver Spring

Alexandria

Hanover

College Park

Oxon Hill

Gaithersburg

Reston

Herndon

Ellicott City

Arlington

Fredericksburg

Rockville

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Alternative routes

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Direct flights to United States

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Other flight options

Other flights from Seattle

Popular flights

Washington, D.C. flight routes

Alternative routes for Seattle to Washington, D.C.

Seattle to Dulles Intl flights

Seattle to Reagan-National flights

Top airline flying from Seattle to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Alaska Airlines	CheapestC$ 224	AverageC$ 632	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Seattle to Washington, D.C.?

When you search for this flight from Seattle to Washington, D.C., Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Washington, D.C.?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Washington, D.C. for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Washington, D.C. with no change fees?

Yes, we can. To see specific flights from Seattle to Washington, D.C. with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Washington, D.C. become cheaper?

Yes, Cheapflights offers price alerts on Seattle to Washington, D.C. 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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Cheap flights from Seattle to Washington, D.C. from C$ 182

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Seattle to Washington, D.C.

Cheapest flights from Seattle to Washington, D.C.Explore the most affordable flight options available from Seattle to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 October 2026.

Explore the most affordable flight options available from Seattle to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 October 2026.

Best flights from Seattle to Washington, D.C.Discover carefully curated flight deals from Seattle to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 19 October 2026.

Discover carefully curated flight deals from Seattle to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 19 October 2026.

Direct flights from Seattle to Washington, D.C.Explore direct flight options from Seattle to Washington, D.C. based on user searches, and compare prices and availability for your desired travel dates. Data last updated 19 October 2026.

Explore direct flight options from Seattle to Washington, D.C. based on user searches, and compare prices and availability for your desired travel dates. Data last updated 19 October 2026.

Last-minute flights from Seattle to Washington, D.C.Discover last-minute flight deals from Seattle to Washington, D.C.. Data last updated 19 October 2026 and is based on user searches.

Discover last-minute flight deals from Seattle to Washington, D.C.. Data last updated 19 October 2026 and is based on user searches.

One-way flights from Seattle to Washington, D.C.Search for one-way flight options from Seattle to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 19 October 2026.

Search for one-way flight options from Seattle to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 19 October 2026.

Find flight deals from Seattle to Washington, D.C.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

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

Best time to book a flight from Seattle to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Seattle with our price prediction graph.

Cheapflights Insights

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

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

Find hourly flight availability from Seattle to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 19 October 2026.

Unlike in the morning, when flights are generally more expensive, you can save up to 51% on flights from Seattle to Washington, D.C. by exploring options for tickets at noon.

Weekly flight availability from Seattle to Washington, D.C.

The most flights from SEA to WAS are scheduled on a Friday (26 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (16 on average).

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

Airfare is below average for this route at the moment.

Seattle to Washington, D.C. flights typically cost between C$ 533 and C$ 844 in November.The cheapest round-trip price found within the last 5 days was C$ 471 on Southwest (18 Nov-25 Nov).

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

Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Washington, D.C.

Read through reviews of airlines operating flights from Seattle to Washington, D.C., such as Alaska Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

How long is the flight from Seattle to Washington, D.C.?

What is the cheapest airline to fly from Seattle to Washington, D.C. round-trip?

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Seattle and Washington, D.C. flights

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Cheapest flights from Seattle to Washington, D.C.
Explore the most affordable flight options available from Seattle to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 October 2026.

Best flights from Seattle to Washington, D.C.
Discover carefully curated flight deals from Seattle to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 19 October 2026.

Direct flights from Seattle to Washington, D.C.
Explore direct flight options from Seattle to Washington, D.C. based on user searches, and compare prices and availability for your desired travel dates. Data last updated 19 October 2026.

Last-minute flights from Seattle to Washington, D.C.
Discover last-minute flight deals from Seattle to Washington, D.C.. Data last updated 19 October 2026 and is based on user searches.

One-way flights from Seattle to Washington, D.C.
Search for one-way flight options from Seattle to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 19 October 2026.

Seattle to Washington, D.C. flights typically cost between C$ 533 and C$ 844 in November.
The cheapest round-trip price found within the last 5 days was C$ 471 on Southwest (18 Nov-25 Nov).