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District of Columbia

$144+ 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 3/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — IAD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$282
(JetBlue)

One-way from

$144
(Hawaiian Airlines)

Popular in

December

Cheapest in

September

Average price

$377

Good round-trip deal

$375 or less

Good one-way deal

$205 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Washington, D.C. (WAS) flights.
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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. 5% potential increase in price ($25 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 February 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 February 20, 2025.

This JetBlue deal was found by Cheapflights users on 2/20. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/711:48 pmSEA - DCA
1 stop11h 10mJetBlue
Tue 3/113:50 pmDCA - SEA
1 stop9h 48mJetBlue
Deal found 2/20$282
This Gotogate deal was found by Cheapflights users on 2/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/72:02 pmSEA - DCA
1 stop19h 01mFrontier
Mon 3/177:00 amDCA - SEA
1 stop8h 02mFrontier
Deal found 2/19$285
This Orbitz deal was found by Cheapflights users on 2/19. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/74:00 pmSEA - IAD
Nonstop4h 58mMultiple Airlines
Fri 5/98:01 amIAD - SEA
1 stop12h 59mMultiple Airlines
Deal found 2/19$285
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/117:23 amSEA - DCA
Nonstop5h 07mDelta
Sun 3/166:00 amDCA - SEA
1 stop7h 42mDelta
Deal found 2/19$287
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/86:00 amSEA - IAD
1 stop6h 50mDelta
Sat 3/157:43 amIAD - SEA
Nonstop6h 02mDelta
Deal found 2/20$287
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/268:15 amSEA - IAD
Nonstop5h 07mUnited Airlines
Thu 5/15:25 pmIAD - SEA
1 stop8h 26mUnited Airlines
Deal found 2/20$288
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/117:55 pmSEA - IAD
1 stop17h 35mAlaska Airlines
Wed 4/167:00 amIAD - SEA
Nonstop5h 52mAlaska Airlines
Deal found 2/20$290
This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1212:59 amSEA - DCA
1 stop8h 16mAmerican Airlines
Mon 3/176:58 pmDCA - SEA
1 stop8h 50mAmerican Airlines
Deal found 2/20$292
This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/111:35 pmSEA - IAD
1 stop7h 21mAmerican Airlines
Wed 4/162:12 pmIAD - SEA
1 stop9h 52mAmerican Airlines
Deal found 2/20$292
This Trip.com deal was found by Cheapflights users on 2/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/202:08 pmSEA - DCA
Nonstop4h 51mHawaiian Airlines
Thu 3/278:00 amDCA - SEA
1 stop9h 45mHawaiian Airlines
Deal found 2/20$300
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/76:20 amSEA - IAD
2 stops15h 25mSouthwest
Mon 3/177:50 pmIAD - SEA
1 stop8h 00mSouthwest
Deal found 2/19$303
This Frontier deal was found by Cheapflights users on 2/20. 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.
Fri 5/166:50 pmSEA - IAD
1 stop8h 41mFrontier
Sat 5/3111:09 amIAD - SEA
1 stop9h 35mFrontier
Deal found 2/20$309

Find flights from Seattle to District of Columbia within your budget

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 February 20, 2025.

Fly from

Seattle

Fly to

District of Columbia

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 3/7

11:48 pm-1:58 pm

1 stop11h 10m

Washington, D.C. Reagan-National

Tue 3/11

3:50 pm-10:38 pm

1 stop9h 48m

$282

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 3/7

2:02 pm-12:03 pm

1 stop19h 01m

Washington, D.C. Reagan-National

Mon 3/17

7:00 am-12:02 pm

1 stop8h 02m

$285

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 3/11

6:00 am-5:25 pm

1 stop8h 25m

Washington, D.C. Reagan-National

Tue 3/18

4:40 pm-7:41 pm

Nonstop6h 01m

$287

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 3/8

7:28 am-3:28 pm

Nonstop5h 00m

Washington, D.C. Dulles Intl

Fri 3/14

5:22 pm-9:56 pm

1 stop7h 34m

$287

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 4/26

8:15 am-4:22 pm

Nonstop5h 07m

Washington, D.C. Dulles Intl

Thu 5/1

5:25 pm-10:51 pm

1 stop8h 26m

$288

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Fri 4/11

7:55 pm-4:30 pm

1 stop17h 35m

Washington, D.C. Dulles Intl

Wed 4/16

7:00 am-9:52 am

Nonstop5h 52m

$290

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 3/12

12:59 am-12:15 pm

1 stop8h 16m

Washington, D.C. Reagan-National

Mon 3/17

6:58 pm-12:48 am

1 stop8h 50m

$292

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Fri 4/11

1:35 pm-11:56 pm

1 stop7h 21m

Washington, D.C. Dulles Intl

Wed 4/16

2:12 pm-9:04 pm

1 stop9h 52m

$292

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 3/20

2:08 pm-9:59 pm

Nonstop4h 51m

Washington, D.C. Reagan-National

Thu 3/27

8:00 am-2:45 pm

1 stop9h 45m

$300

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Fri 3/7

6:20 am-12:45 am

2 stops15h 25m

Washington, D.C. Dulles Intl

Mon 3/17

7:50 pm-12:50 am

1 stop8h 00m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 35 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.

Travel insights for flights from Seattle to District of Columbia

Get recent, data-driven insights about flights from Seattle to District of Columbia including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Seattle to District of Columbia (average of $309). Flying from Seattle to District of Columbia in June is currently the most expensive (average of $389). 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 February 20, 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 February 20, 2025.

The most flights from SEA to USDC are scheduled on a Thursday (21 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (9 on average).

Rainfall in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in District of Columbia ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit District of Columbia when rainfall is around 2.6 in.

Temperature in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to District of Columbia, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 February 20, 2025.
See what other customers who have flown with Southwest, Alaska Airlines and Delta from Seattle to District of Columbia have to say. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

JetBlue
7.4
Good
3,070 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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.

  • 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 $144. Users have also found prices from $144 and $145 on Alaska Airlines and Sun Country Air, 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: China Eastern (90%), Ethiopian Air (90%), Korean Air( 89%).

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

    While on average a flight from Seattle to District of Columbia is generally $1,003, our data shows the cheapest flight currently is $143. When looking at the most popular route, (Seattle/Tacoma Intl - Washington, D.C. Reagan-National), you can expect to pay $180 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, August is the cheapest month in which you can book a flight from Seattle to District of Columbia (average of $309). Flying from Seattle to District of Columbia in June is currently the most expensive (average of $389). 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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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$86Average$227FlexibilityNo cancel feeOn-time62%
DeltaCheapest$157Average$459FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$169Average$534FlexibilityNo cancel feeOn-time83%
Spirit AirlinesCheapest$178Average$267FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$206Average$469FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$236Average$511FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$245Average$431FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$296Average$487FlexibilityNo cancel feeOn-time63%
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