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District of Columbia

$148+ Cheap flights from Seattle (SEA) to District of Columbia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — IAD
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from Seattle to District of Columbia

Keep the following information in mind while searching for Seattle to District of Columbia flight deals. Data was last updated August 18, 2025.

Round-trip from

$249
(Frontier)

One-way from

$148
(Hawaiian Airlines)

Popular in

December

Cheapest in

September

Average price

$387

Good round-trip deal

$315 or less

Good one-way deal

$209 or less
From Seattle/Tacoma Intl to District of Columbia
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One-way flight from Seattle/Tacoma Intl to District of Columbia
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Highest demand for flights based on searches. 9% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to District of Columbia.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to District of Columbia.
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Find flight deals from Seattle to District of Columbia

Cheapest flights from Seattle to District of Columbia
Explore the most affordable flight options available from Seattle to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/68:22 pmSEA - DCA
2 stops17h 39mFrontier
Sun 11/97:00 amDCA - SEA
1 stop8h 13mFrontier
Deal found 8/17$252
This CheapOair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/276:41 amSEA - DCA
1 stop26h 30mFrontier
Tue 9/27:00 amDCA - SEA
1 stop19h 01mFrontier
Deal found 8/17$254
This Kiwi.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/51:52 pmSEA - DCA
Nonstop5h 07mMultiple Airlines
Sat 11/157:00 amDCA - SEA
1 stop8h 13mMultiple Airlines
Deal found 8/16$255
This Frontier deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:00 amSEA - IAD
2 stops23h 17mFrontier
Fri 9/261:55 pmIAD - SEA
2 stops13h 35mFrontier
Deal found 8/17$255
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:46 pmSEA - DCA
Nonstop5h 13mMultiple Airlines
Mon 10/207:00 amDCA - SEA
1 stop8h 07mMultiple Airlines
Deal found 8/17$256
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/124:40 pmSEA - DCA
2 stops16h 30mFrontier
Mon 9/226:00 pmDCA - SEA
1 stop9h 30mFrontier
Deal found 8/17$258
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/171:52 pmSEA - DCA
Nonstop5h 07mMultiple Airlines
Wed 11/197:00 amDCA - SEA
1 stop8h 13mMultiple Airlines
Deal found 8/17$259
This CheapOair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/146:12 amSEA - DCA
1 stop26h 58mFrontier
Thu 9/186:00 pmDCA - SEA
1 stop9h 30mFrontier
Deal found 8/18$260
This Kiwi.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/196:41 amSEA - DCA
1 stop26h 30mFrontier
Sun 8/246:00 pmDCA - SEA
1 stop18h 34mFrontier
Deal found 8/16$261
This Frontier deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:12 amSEA - IAD
2 stops15h 03mFrontier
Thu 10/91:07 pmIAD - SEA
2 stops21h 26mFrontier
Deal found 8/18$262
This Kiwi.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:17 amSEA - DCA
1 stop26h 54mFrontier
Mon 8/256:00 pmDCA - SEA
1 stop9h 34mFrontier
Deal found 8/16$263
This KAYAK deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/58:44 amSEA - IAD
Nonstop4h 56mHawaiian Airlines
Sun 11/97:43 amIAD - SEA
Nonstop5h 52mHawaiian Airlines
Deal found 8/16$263

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to District of Columbia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 18, 2025.
Use the filters below to find and compare flights from Seattle to District of Columbia that are best for you.

Fly from

Seattle

Fly to

District of Columbia

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 11/6

8:22 pm-5:01 pm

2 stops17h 39m

Washington, D.C. Reagan-National

Sun 11/9

7:00 am-12:13 pm

1 stop8h 13m

$252

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 9/18

6:12 am-4:59 pm

1 stop7h 47m

Washington, D.C. Reagan-National

Thu 9/18

6:00 pm-12:30 am

1 stop9h 30m

$252

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 11/1

9:22 pm-6:01 pm

2 stops17h 39m

Washington, D.C. Reagan-National

Mon 11/3

7:00 am-12:13 pm

1 stop8h 13m

$252

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 10/15

1:46 pm-9:59 pm

Nonstop5h 13m

Washington, D.C. Reagan-National

Wed 10/22

7:00 am-12:07 pm

1 stop8h 07m

$254

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 9/12

6:12 am-4:59 pm

1 stop7h 47m

Washington, D.C. Reagan-National

Tue 9/16

5:06 pm-7:56 pm

Nonstop5h 50m

$254

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 11/6

1:52 pm-9:59 pm

Nonstop5h 07m

Washington, D.C. Reagan-National

Sun 11/9

7:00 am-12:13 pm

1 stop8h 13m

$254

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 10/30

1:52 pm-9:59 pm

Nonstop5h 07m

Washington, D.C. Reagan-National

Mon 11/3

7:00 am-12:13 pm

1 stop8h 13m

$254

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 8/27

6:41 am-12:11 pm

1 stop26h 30m

Washington, D.C. Reagan-National

Tue 9/2

7:00 am-11:01 pm

1 stop19h 01m

$254

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 11/14

1:52 pm-9:59 pm

Nonstop5h 07m

Washington, D.C. Reagan-National

Sun 11/16

7:00 am-12:13 pm

1 stop8h 13m

$254

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sun 11/2

1:52 pm-9:59 pm

Nonstop5h 07m

Washington, D.C. Reagan-National

Wed 11/5

7:00 am-12:13 pm

1 stop8h 13m

$254

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 34 results
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Best time to book a flight from Seattle to District of Columbia

Have a flexible travel schedule? Discover the best time to fly to District of Columbia from Seattle with our price prediction graph.
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 District of Columbia

What is the cheapest month to book a flight from Seattle to District of Columbia?

Currently, July is the cheapest month in which you can book a flight from Seattle to District of Columbia (average of $302). Flying from Seattle to District of Columbia in April is currently the most expensive (average of $337). 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 DC?

Find hourly flight availability from Seattle to District of Columbia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to District of Columbia as you normally would.

Weekly flight availability from Seattle to District of Columbia

Explore weekly flight availability from Seattle to District of Columbia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 18, 2025.

The most flights from SEA to USDC are scheduled on a Monday (32 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (3 on average).

Reviews of airlines servicing District of Columbia

Get insights into the airlines that provide service to District of Columbia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to District of Columbia. Reviews last updated August 18, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta, and Hawaiian Airlines from Seattle to District of Columbia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,664 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Frontier
5.8
Fair
3,212 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Seattle to District of Columbia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to District of Columbia?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to District of Columbia. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from Seattle to District of Columbia?

    There are many flights that can get you from Seattle to District of Columbia in 4h 56m. Fly via Frontier, Hawaiian Airlines, or Delta to get the fastest option. There are 2299 mi between Seattle and District of Columbia. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Seattle to District of Columbia one-way?

    For one-way options, check prices for Hawaiian Airlines. According to our data, you can fly for as low as $148. Users have also found prices from $148 and $149 on Sun Country Air and Southwest, respectively.

  • What are the most reliable airlines from Seattle to District of Columbia?

    Before booking your flight to District of Columbia from Seattle, check out the most reliable airlines to get you to your destination on time: Austrian Airlines (82%), Brussels Airlines (82%), Lufthansa( 78%).

  • What are the cheapest flights from Seattle to District of Columbia?

    While on average a flight from Seattle to District of Columbia is generally $873, our data shows the cheapest flight currently is $158. When looking at the most popular route, (Seattle/Tacoma Intl - Washington, D.C. Reagan-National), you can expect to pay $224 for that flight.

  • Can I find deals for flights from Seattle to District of Columbia that include hotel bookings?

    Yes. In addition to deals on Seattle to District of Columbia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to District of Columbia?

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

  • Can I find deals for business class flights from Seattle to District of Columbia?

    Yes. Cheapflights offers flight deals from Seattle to District of Columbia 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 District of Columbia?

    Currently, July is the cheapest month in which you can book a flight from Seattle to District of Columbia (average of $302). Flying from Seattle to District of Columbia in April is currently the most expensive (average of $337). 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.

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Alternative routes for Seattle to District of Columbia

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Top 8 airlines flying from Seattle to District of Columbia

Discover the top 8 airlines that operate flights from Seattle to District of Columbia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$233FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$143Average$403FlexibilityNo cancel feeOn-time85%
Spirit AirlinesCheapest$178Average$276FlexibilityNo cancel feeOn-time65%
DeltaCheapest$201Average$386FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$206Average$435FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$237Average$413FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$261Average$476FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$277Average$451FlexibilityNo cancel feeOn-time63%

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