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$132+ Cheap flights from District of Columbia to Seattle (SEA)

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SEA
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from District of Columbia to Seattle

Keep the following information in mind while searching for District of Columbia to Seattle flight deals. Data was last updated September 15, 2025.

Round-trip from

$238
(CheapOair)

One-way from

$132
(Southwest)

Popular in

December

Cheapest in

September

Average price

$366

Good round-trip deal

$319 or less

Good one-way deal

$196 or less
From District of Columbia to Seattle/Tacoma Intl
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One-way flight from District of Columbia to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 4% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from District of Columbia to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from District of Columbia to Seattle/Tacoma Intl.
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Find flight deals from District of Columbia to Seattle

Cheapest flights from District of Columbia to Seattle
Explore the most affordable flight options available from District of Columbia to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This CheapOair deal was found by Cheapflights users on 9/14. 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.
Fri 11/76:00 pmDCA - SEA
1 stop21h 13mFrontier
Tue 11/1112:58 pmSEA - DCA
1 stop20h 03mFrontier
Deal found 9/14$238
This Frontier deal was found by Cheapflights users on 9/13. 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 9/251:00 pmDCA - SEA
1 stop14h 30mFrontier
Sat 9/277:00 amSEA - DCA
1 stop11h 59mFrontier
Deal found 9/13$239
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/176:31 pmDCA - SEA
1 stop20h 36mFrontier
Mon 10/208:43 pmSEA - DCA
1 stop17h 16mFrontier
Deal found 9/13$240
This CheapOair deal was found by Cheapflights users on 9/14. 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.
Mon 11/36:00 amIAD - SEA
2 stops33h 13mFrontier
Thu 11/61:08 pmSEA - IAD
2 stops24h 26mFrontier
Deal found 9/14$241
This Frontier deal was found by Cheapflights users on 9/14. 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.
Mon 11/38:00 amDCA - SEA
1 stop8h 03mFrontier
Sat 11/87:17 pmSEA - DCA
2 stops13h 47mFrontier
Deal found 9/14$241
This Frontier deal was found by Cheapflights users on 9/15. 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 10/227:00 amDCA - SEA
1 stop8h 07mFrontier
Sun 10/269:58 pmSEA - DCA
2 stops21h 01mFrontier
Deal found 9/15$242
This Frontier deal was found by Cheapflights users on 9/15. 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 10/248:53 pmIAD - SEA
2 stops18h 14mFrontier
Sun 10/268:43 pmSEA - IAD
2 stops21h 55mFrontier
Deal found 9/15$243
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Sat 11/158:15 amDCA - SEA
2 stops13h 17mFrontier
Mon 11/172:22 pmSEA - DCA
1 stop23h 37mFrontier
Deal found 9/15$244
This CheapOair deal was found by Cheapflights users on 9/13. 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.
Thu 10/26:31 pmDCA - SEA
1 stop8h 59mFrontier
Tue 10/71:02 pmSEA - DCA
1 stop20h 02mFrontier
Deal found 9/13$245
This CheapOair deal was found by Cheapflights users on 9/15. 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 9/286:10 amIAD - SEA
2 stops45h 20mFrontier
Sun 10/56:12 amSEA - IAD
2 stops27h 43mFrontier
Deal found 9/15$246
This Gotogate deal was found by Cheapflights users on 9/14. 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.
Sun 10/127:00 amDCA - SEA
1 stop27h 33mFrontier
Sun 10/198:43 pmSEA - DCA
1 stop12h 21mFrontier
Deal found 9/14$246
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Sat 11/16:00 pmDCA - SEA
2 stops20h 55mFrontier
Tue 11/412:58 pmSEA - DCA
1 stop20h 06mFrontier
Deal found 9/14$247

Cheapflights Fare Finder

 
Customize your flight search to find flights from District of Columbia to Seattle 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 September 15, 2025.
Use the filters below to find and compare flights from District of Columbia to Seattle that are best for you.

Fly from

District of Columbia

Fly to

Seattle

Route

Depart

Return

Price

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Fri 11/7

7:35 am-10:28 am

Nonstop5h 53m

Seattle/Tacoma Intl

Fri 11/14

4:59 pm-12:54 am

Nonstop4h 55m

$257

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sun 11/9

7:43 am-10:35 am

Nonstop5h 52m

Seattle/Tacoma Intl

Sat 11/15

8:44 am-4:40 pm

Nonstop4h 56m

$257

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 10/23

7:35 am-10:28 am

Nonstop5h 53m

Seattle/Tacoma Intl

Mon 10/27

4:48 pm-12:40 am

Nonstop4h 52m

$257

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 11/8

5:00 pm-8:03 pm

Nonstop6h 03m

Seattle/Tacoma Intl

Thu 11/13

8:49 am-4:53 pm

Nonstop5h 04m

$257

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Tue 11/4

7:35 am-10:28 am

Nonstop5h 53m

Seattle/Tacoma Intl

Wed 11/12

4:59 pm-12:54 am

Nonstop4h 55m

$257

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 11/1

8:00 am-11:03 am

Nonstop6h 03m

Seattle/Tacoma Intl

Mon 11/3

1:52 pm-9:59 pm

Nonstop5h 07m

$257

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 10/18

7:35 am-10:28 am

Nonstop5h 53m

Seattle/Tacoma Intl

Wed 10/29

4:48 pm-12:40 am

Nonstop4h 52m

$257

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Mon 11/24

7:15 am-10:19 am

Nonstop6h 04m

Seattle/Tacoma Intl

Fri 11/28

4:59 pm-12:54 am

Nonstop4h 55m

$257

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 11/6

7:35 am-10:28 am

Nonstop5h 53m

Seattle/Tacoma Intl

Wed 11/12

4:59 pm-12:54 am

Nonstop4h 55m

$257

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Mon 10/20

7:35 am-10:28 am

Nonstop5h 53m

Seattle/Tacoma Intl

Sun 11/2

4:48 pm-12:40 am

Nonstop4h 52m

$257

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 42 results
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Best time to book a flight from District of Columbia to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from District of Columbia 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 District of Columbia to Seattle

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

Currently, January is the cheapest month in which you can book a flight from District of Columbia to Seattle (average of $238). Flying from District of Columbia to Seattle in June is currently the most expensive (average of $387). 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 DC to SEA?

Find hourly flight availability from District of Columbia to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

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

Weekly flight availability from District of Columbia to Seattle

Explore weekly flight availability from District of Columbia to Seattle. 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 September 15, 2025.

The most flights from USDC to SEA are scheduled on a Monday (29 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (17 on average).

Related info for your journey

Find useful and relevant information for your journey from District of Columbia to Seattle. 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 into for flights to Seattle from District of Columbia?

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

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

    Departing from District of Columbia to Seattle will take you 5h 53m. Airlines will cover a distance of 2299 mi. All flights are typically nonstop.

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

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $132. However, be on the lookout for offers from Hawaiian Airlines and Alaska Airlines, as they are both options that can get you from District of Columbia to Seattle for a low price.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from District of Columbia to Seattle on time: Japan Airlines (97%), China Eastern (90%), Delta (90%).

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

    The cheapest flight price from District of Columbia to Seattle is $148. On average you can expect to pay $844. The most popular route, (Washington, D.C. Reagan-National - Seattle/Tacoma Intl), can usually be booked for $172.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from District of Columbia to Seattle (average of $238). Flying from District of Columbia to Seattle in June is currently the most expensive (average of $387). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

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Top 9 airlines flying from District of Columbia to Seattle

Discover the top 9 airlines that operate flights from District of Columbia to Seattle. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$111Average$264FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$126Average$268FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$157Average$443FlexibilityNo cancel feeOn-time85%
DeltaCheapest$182Average$372FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$206Average$453FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$259Average$492FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$269Average$481FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$276Average$425FlexibilityNo cancel feeOn-time69%
Sun Country AirCheapest$313Average$402FlexibilityNo cancel feeOn-time83%

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