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$141+ Cheap flights from Washington, D.C. (WAS) 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SEA
Apr 9 — Apr 161
Wed 4/9
Wed 4/16
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to Seattle/Tacoma Intl are usually found in September or October, booked 30 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

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

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 4, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$245
(Mytrip)

One-way from

$141
(Mytrip)

Popular in

June

Cheapest in

September

Average price

$380

Good round-trip deal

$298 or less

Good one-way deal

$184 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Seattle/Tacoma Intl flights.
Search Deals
From Washington, D.C. (WAS) to Seattle/Tacoma Intl
Search Deals
One-way flight from Washington, D.C. (WAS) to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from Washington, D.C. (WAS) to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Washington, D.C. (WAS) to Seattle/Tacoma Intl.
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Find flight deals from Washington, D.C. to Seattle

Cheapest flights from Washington, D.C. to Seattle
Explore the most affordable flight options available from Washington, D.C. to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.

This Mytrip deal was found by Cheapflights users on 4/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/66:10 amBWI - SEA
2 stops35h 15mSpirit Airlines
Tue 5/133:20 pmSEA - BWI
2 stops25h 19mSpirit Airlines
Deal found 4/2$245
This Expedia deal was found by Cheapflights users on 4/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/229:39 pmBWI - SEA
1 stop16h 56mMultiple Airlines
Sat 5/39:40 pmSEA - BWI
Nonstop5h 06mMultiple Airlines
Deal found 4/2$249
This CheapOair deal was found by Cheapflights users on 4/3. 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 4/1812:17 pmBWI - SEA
1 stop30h 15mFrontier
Mon 4/286:00 amSEA - BWI
1 stop7h 58mFrontier
Deal found 4/3$250
This Alaska Airlines deal was found by Cheapflights users on 4/3. 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.
Sat 5/317:05 pmBWI - SEA
Nonstop5h 55mAlaska Airlines
Sat 6/710:27 pmSEA - BWI
Nonstop5h 02mAlaska Airlines
Deal found 4/3$257
This Delta deal was found by Cheapflights users on 4/3. 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 5/276:00 amBWI - SEA
1 stop7h 28mDelta
Mon 6/97:33 pmSEA - BWI
1 stop7h 15mDelta
Deal found 4/3$273
This Hawaiian Airlines deal was found by Cheapflights users on 4/3. 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.
Sat 5/35:38 pmIAD - SEA
1 stop9h 17mHawaiian Airlines
Sat 5/105:59 pmSEA - IAD
1 stop8h 41mHawaiian Airlines
Deal found 4/3$276
This Hawaiian Airlines deal was found by Cheapflights users on 4/3. 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 6/39:59 amDCA - SEA
1 stop11h 52mHawaiian Airlines
Tue 6/107:00 amSEA - DCA
1 stop11h 05mHawaiian Airlines
Deal found 4/3$276
This Alaska Airlines deal was found by Cheapflights users on 4/3. 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.
Sat 6/77:00 amIAD - SEA
Nonstop5h 40mAlaska Airlines
Tue 6/1011:30 pmSEA - IAD
Nonstop5h 06mAlaska Airlines
Deal found 4/3$277
This United Airlines deal was found by Cheapflights users on 4/3. 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 5/245:59 pmDCA - SEA
1 stop10h 00mUnited Airlines
Wed 6/47:00 amSEA - DCA
1 stop8h 02mUnited Airlines
Deal found 4/3$277
This Expedia deal was found by Cheapflights users on 4/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/248:00 amDCA - SEA
Nonstop5h 40mMultiple Airlines
Thu 5/16:00 amSEA - DCA
1 stop7h 59mMultiple Airlines
Deal found 4/3$279
This CheapOair deal was found by Cheapflights users on 4/3. 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 4/201:03 pmDCA - SEA
1 stop25h 53mFrontier
Wed 4/236:00 amSEA - DCA
1 stop12h 59mFrontier
Deal found 4/3$280
This United Airlines deal was found by Cheapflights users on 4/3. 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 4/266:31 amBWI - SEA
1 stop11h 06mUnited Airlines
Tue 4/297:33 pmSEA - BWI
2 stops11h 21mUnited Airlines
Deal found 4/3$282

Cheapflights Fare Finder

Customize your flight search to find flights from Washington, D.C. 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 April 4, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Seattle that are best for you.

Fly from

Washington, D.C.

Fly to

Seattle

Route

Depart

Return

Price

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 5/6

6:10 am-2:25 pm

2 stops35h 15m

Seattle/Tacoma Intl

Tue 5/13

3:20 pm-7:39 pm

2 stops25h 19m

$245

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 4/22

9:39 pm-11:35 am

1 stop16h 56m

Seattle/Tacoma Intl

Sat 5/3

9:40 pm-5:46 am

Nonstop5h 06m

$249

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Fri 4/18

12:17 pm-3:32 pm

1 stop30h 15m

Seattle/Tacoma Intl

Mon 4/28

6:00 am-4:58 pm

1 stop7h 58m

$250

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sat 5/31

7:05 pm-10:00 pm

Nonstop5h 55m

Seattle/Tacoma Intl

Sat 6/7

10:27 pm-6:29 am

Nonstop5h 02m

$257

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 5/27

6:00 am-10:28 am

1 stop7h 28m

Seattle/Tacoma Intl

Tue 5/27

11:50 pm-10:27 am

1 stop7h 37m

$273

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 5/3

5:38 pm-11:55 pm

1 stop9h 17m

Seattle/Tacoma Intl

Sat 5/10

5:59 pm-5:40 am

1 stop8h 41m

$276

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 6/3

9:59 am-6:51 pm

1 stop11h 52m

Seattle/Tacoma Intl

Tue 6/10

7:00 am-9:05 pm

1 stop11h 05m

$276

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 5/24

5:59 pm-12:59 am

1 stop10h 00m

Seattle/Tacoma Intl

Wed 5/28

11:50 pm-10:56 am

1 stop8h 06m

$277

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 6/7

6:15 pm-9:00 pm

Nonstop5h 45m

Seattle/Tacoma Intl

Sat 6/14

11:30 pm-7:27 am

Nonstop4h 57m

$277

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Thu 4/24

8:00 am-10:40 am

Nonstop5h 40m

Seattle/Tacoma Intl

Thu 5/1

6:00 am-4:59 pm

1 stop7h 59m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/3

Showing 1-10 of 55 results
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Compare providers for flights from Washington, D.C. to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Seattle in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C.-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Washington, D.C. to Seattle flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. to Seattle trip
Airports
IAD

Check-in at IAD can be crowded in the afternoon and evening. Arrive early to navigate the busy main terminal efficiently.

Read more about IADby Ramsey Qubein
SEA

Use the Link light rail from SEA to downtown Seattle for a cost-effective, 40-minute journey with ample luggage space.

Read more about SEAby Brandon Schultz
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on IAD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

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

Have a flexible travel schedule? Discover the best time to fly to Seattle from Washington, D.C. 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 Washington, D.C. to Seattle

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

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Seattle. Price data was last updated on March 28, 2025.

The best time to book flights from Washington, D.C. to Seattle is 30 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Seattle (average of $238). Flying from Washington, D.C. 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 WAS to SEA?

Find hourly flight availability from Washington, D.C. 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 April 4, 2025.

It’s typically best to fly out from Washington, D.C. to Seattle in the afternoon. Doing so could potentially save you 24% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Washington, D.C. to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Seattle. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their Washington, D.C. to Seattle flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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

Explore weekly flight availability from Washington, D.C. 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 April 4, 2025.

The most flights from WAS to SEA are scheduled on a Thursday (32 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (23 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 April 4, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Washington, D.C. to Seattle have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,835 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,835 reviews
Alaska Airlines
8.0
Very good
9,835 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
9,835 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,897 reviews
Alaska Airlines
8.0
Very good
9,835 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,347 reviews
Alaska Airlines
8.0
Very good
9,835 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,619 reviews
Alaska Airlines
8.0
Very good
9,835 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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 Washington, D.C.?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. to Seattle. 11 airlines have flights to Seattle/Tacoma Intl from Washington, D.C. on a regular basis. Booking flights from Washington, D.C. to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 27 inbound flights from Washington, D.C. per day.

  • How popular is this Washington, D.C. to Seattle flight route?

    Flights from Washington, D.C. to Seattle/Tacoma Intl have been viewed 24 times in the past calendar month.

  • What are the cheapest airlines flying from Washington, D.C. to Seattle round-trip?

    According to our current data, Spirit Airlines ($245), Frontier ($250), and Alaska Airlines ($257) offers the cheapest pricing from Washington, D.C. to Seattle. You may be able to fly from Washington, D.C. to Seattle for 41% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Washington, D.C. to Seattle one-way?

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $141. Users have also found prices from $144 and $144 on Delta and United Airlines, respectively.

  • What are the most popular routes from Washington, D.C. to Seattle?

    The most popular flight routes from Washington, D.C. to Seattle are Washington, D.C. Reagan-National - Seattle/Tacoma Intl, Washington, D.C. Dulles Intl - Seattle/Tacoma Intl and Baltimore/Washington - Seattle/Tacoma Intl.

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

    Consider Air Tahiti Nui (78%), Hawaiian Airlines (77%) or Alaska Airlines (77%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. to Seattle.

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

    Looking for the cheapest flight from Washington, D.C. to Seattle? While on average our users pay $1,548, our data indicates the cheapest price to be $138. The most popular route (Washington, D.C. Reagan-National - Seattle/Tacoma Intl), is priced around $240.

  • Where are the most common layover locations when flying from Washington, D.C. to Seattle?

    Of the flights from Washington, D.C. to Seattle that have layovers, most of them stop in Denver.

  • What are some popular things to do or see while on a layover in Denver?

    The majority of Denver visitors spend their time at Coors Field, Paramount Theatre, and 16th Street Mall. Coors Field, Paramount Theatre, and 16th Street Mall can be visited by traveling about 18.4 mi, 18.6 mi, and 18.7 mi respectively from Denver Intl. Travelers can rent a car at Denver Intl for an average daily rate of $46 to make sightseeing during their layover a little easier.

  • Where are the least popular layover locations for Washington, D.C. to Seattle flights?

    Washington, D.C. to Seattle flights have a layover in Chicago the least frequently.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington, D.C. 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 Washington, D.C. to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Seattle (average of $238). Flying from Washington, D.C. 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 Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Renton
Lacey
Ocean Shores
Leavenworth
Federal Way
Olympia
Cle Elum
Centralia
Mukilteo
Aberdeen
Shoreline
Lynnwood
Shelton
Silverdale
Redmond
Monroe

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Washington, D.C. to Seattle

Discover the top 10 airlines that operate flights from Washington, D.C. 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 April 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$90Average$251FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$131Average$382FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$143Average$492FlexibilityNo cancel feeOn-time85%
Sun Country AirCheapest$144Average$362FlexibilityNo cancel feeOn-time83%
Spirit AirlinesCheapest$145Average$262FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$206Average$465FlexibilityNo cancel feeOn-time71%
DeltaCheapest$206Average$412FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$241Average$495FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$277Average$453FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$306Average$566FlexibilityNo cancel feeOn-time63%

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