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$142+ 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 3/20. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SEA
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$277
(Delta)

One-way from

$142
(Cheapflightsfares)

Popular in

June

Cheapest in

September

Average price

$387

Good round-trip deal

$393 or less

Good one-way deal

$212 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Seattle/Tacoma Intl flights.
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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. 9% potential increase in price ($44 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 February 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 February 20, 2025.

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.
Thu 4/37:35 amIAD - SEA
1 stop7h 50mDelta
Tue 4/812:00 pmSEA - IAD
1 stop8h 25mDelta
Deal found 2/19$277
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.
Mon 3/176:00 amDCA - SEA
1 stop7h 42mDelta
Sun 3/2312:49 amSEA - DCA
1 stop7h 11mDelta
Deal found 2/20$277
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 4/251:00 pmDCA - SEA
1 stop14h 44mFrontier
Tue 4/296:00 amSEA - DCA
1 stop7h 59mFrontier
Deal found 2/19$278
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.
Sat 4/266:00 pmDCA - SEA
1 stop9h 44mMultiple Airlines
Tue 4/291:50 pmSEA - DCA
Nonstop5h 09mMultiple Airlines
Deal found 2/19$279
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.
Thu 3/207:31 amIAD - SEA
1 stop12h 23mAlaska Airlines
Mon 3/248:00 amSEA - IAD
2 stops18h 40mAlaska Airlines
Deal found 2/20$280
This JetBlue deal was found by Cheapflights users on 2/18. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/93:50 pmDCA - SEA
1 stop9h 48mJetBlue
Sat 3/1511:48 pmSEA - DCA
1 stop11h 10mJetBlue
Deal found 2/18$286
This Hawaiian 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/207:00 amIAD - SEA
Nonstop5h 52mHawaiian Airlines
Sun 3/239:40 pmSEA - IAD
Nonstop4h 54mHawaiian Airlines
Deal found 2/20$287
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/35:26 pmIAD - SEA
Nonstop5h 52mUnited Airlines
Sat 5/1012:55 pmSEA - IAD
Nonstop5h 08mUnited Airlines
Deal found 2/19$288
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.
Thu 3/206:27 amIAD - SEA
1 stop9h 23mAmerican Airlines
Wed 3/2610:00 pmSEA - IAD
1 stop7h 50mAmerican Airlines
Deal found 2/20$292
This Hawaiian Airlines 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/185:25 pmDCA - SEA
Nonstop6h 10mHawaiian Airlines
Tue 3/259:55 amSEA - DCA
1 stop9h 00mHawaiian Airlines
Deal found 2/19$297
This Alaska Airlines deal was found by Cheapflights users on 2/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/198:00 amDCA - SEA
1 stop9h 45mAlaska Airlines
Wed 3/269:55 amSEA - DCA
1 stop9h 00mAlaska Airlines
Deal found 2/18$306
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.
Wed 4/305:30 pmIAD - SEA
1 stop9h 20mSouthwest
Tue 5/67:10 amSEA - IAD
2 stops12h 25mSouthwest
Deal found 2/19$312

Find flights from District of Columbia to Seattle within your budget

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 February 20, 2025.

Fly from

District of Columbia

Fly to

Seattle

Route

Depart

Return

Price

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 4/3

7:35 am-12:25 pm

1 stop7h 50m

Seattle/Tacoma Intl

Tue 4/8

12:00 pm-11:25 pm

1 stop8h 25m

$277

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 3/17

6:00 am-10:42 am

1 stop7h 42m

Seattle/Tacoma Intl

Thu 3/20

6:00 am-4:48 pm

1 stop7h 48m

$277

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 3/20

7:31 am-4:54 pm

1 stop12h 23m

Seattle/Tacoma Intl

Mon 3/24

8:00 am-5:40 am

2 stops18h 40m

$280

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 4/9

8:00 am-9:25 am

1 stop28h 25m

Seattle/Tacoma Intl

Wed 4/16

2:08 pm-9:59 pm

Nonstop4h 51m

$280

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Thu 4/24

1:00 pm-12:44 am

1 stop14h 44m

Seattle/Tacoma Intl

Tue 4/29

1:50 pm-9:59 pm

Nonstop5h 09m

$284

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 3/20

7:00 am-9:52 am

Nonstop5h 52m

Seattle/Tacoma Intl

Sun 3/23

9:40 pm-5:34 am

Nonstop4h 54m

$287

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 5/3

5:26 pm-8:18 pm

Nonstop5h 52m

Seattle/Tacoma Intl

Sat 5/10

12:55 pm-9:03 pm

Nonstop5h 08m

$288

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 5/6

6:00 pm-12:44 am

1 stop9h 44m

Seattle/Tacoma Intl

Mon 5/12

12:21 pm-12:07 pm

1 stop20h 46m

$288

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 3/20

6:27 am-12:50 pm

1 stop9h 23m

Seattle/Tacoma Intl

Wed 3/26

10:00 pm-8:50 am

1 stop7h 50m

$292

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 3/3

3:50 pm-10:38 pm

1 stop9h 48m

Seattle/Tacoma Intl

Wed 3/5

11:48 pm-11:44 am

1 stop8h 56m

$292

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 36 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.

Travel insights for flights from District of Columbia to Seattle

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

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 July is currently the most expensive (average of $411). 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 February 20, 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 February 20, 2025.

The most flights from USDC to SEA are scheduled on a Thursday (21 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated February 20, 2025.
See what other customers who have flown with Southwest, Alaska Airlines and Delta from District of Columbia to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

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

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

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
9,692 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

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
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

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

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

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

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

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 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.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $142. However, be on the lookout for offers from Alaska Airlines and Hawaiian 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: China Eastern (81%), Hawaiian Airlines (76%), Singapore Airlines (76%).

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

    The cheapest flight price from District of Columbia to Seattle is $143. On average you can expect to pay $921. The most popular route, (Washington, D.C. Reagan-National - Seattle/Tacoma Intl), can usually be booked for $137.

  • 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 July is currently the most expensive (average of $411). 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 District of Columbia?

Book flights to District of Columbia if you plan to visit one of these locations
SeaTac
Tukwila
Renton
Tacoma
Lacey
Ocean Shores
Leavenworth
Olympia
Federal Way
Centralia
Marysville
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for District of Columbia to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$90Average$249FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$144Average$363FlexibilityNo cancel feeOn-time83%
Spirit AirlinesCheapest$156Average$262FlexibilityNo cancel feeOn-time65%
DeltaCheapest$193Average$416FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$206Average$431FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$238Average$504FlexibilityNo cancel feeOn-time75%
JetBlueCheapest$277Average$417FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$278Average$458FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$306Average$576FlexibilityNo cancel feeOn-time63%
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