Seattle

$139+ 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SEA
Dec 7 — Dec 141
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington, D.C. to Seattle with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Washington, D.C. to Seattle/Tacoma Intl are usually found in January or February, 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 December 2, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

January

Round-trip from

$257
(Alaska Airlines)

One-way from

$139
(United Airlines)
Provider with most accurate pricing for Washington, D.C. (WAS)-Seattle/Tacoma Intl flight deals.
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Seattle/Tacoma Intl flights.
High demand for flights, 17% potential price rise
Best time to find cheap flights, 19% potential price drop
From Washington, D.C. (WAS) to Seattle/Tacoma Intl
One-way flight from Washington, D.C. (WAS) to Seattle/Tacoma Intl

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 December 2, 2024.

This Kiwi.com deal was found by Cheapflights users on 12/1. 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 12/97:00 amDCA - SEA
1 stop9h 34mFrontier
Sun 1/123:17 pmSEA - DCA
1 stop17h 44mFrontier
Deal found 12/1$265
This FlightHub deal was found by Cheapflights users on 11/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/139:46 amBWI - SEA
1 stop13h 40mSpirit Airlines
Mon 1/205:55 pmSEA - BWI
1 stop25h 07mSpirit Airlines
Deal found 11/30$269
This Expedia deal was found by Cheapflights users on 12/1. 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.
Wed 12/257:00 amDCA - SEA
1 stop9h 10mMultiple Airlines
Wed 1/297:42 amSEA - DCA
1 stop7h 11mMultiple Airlines
Deal found 12/1$357
This Travelocity deal was found by Cheapflights users on 12/1. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/148:00 amBWI - SEA
1 stop9h 53mMultiple Airlines
Mon 12/169:58 amSEA - BWI
Nonstop5h 01mMultiple Airlines
Deal found 12/1$359
This Delta deal was found by Cheapflights users on 12/1. 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 12/166:20 pmIAD - SEA
Nonstop6h 10mDelta
Wed 12/2510:08 pmSEA - IAD
Nonstop5h 02mDelta
Deal found 12/1$377
This Alaska Airlines deal was found by Cheapflights users on 12/1. 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.
Sun 12/157:00 amIAD - SEA
Nonstop6h 00mAlaska Airlines
Wed 12/259:39 pmSEA - IAD
Nonstop5h 01mAlaska Airlines
Deal found 12/1$382
This United Airlines deal was found by Cheapflights users on 12/1. 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.
Tue 12/176:30 amIAD - SEA
1 stop9h 28mUnited Airlines
Wed 1/158:00 amSEA - IAD
Nonstop5h 06mUnited Airlines
Deal found 12/1$387
This United Airlines deal was found by Cheapflights users on 12/1. 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.
Tue 12/176:00 pmDCA - SEA
1 stop7h 46mUnited Airlines
Wed 1/155:00 amSEA - DCA
1 stop6h 59mUnited Airlines
Deal found 12/1$396
This American Airlines deal was found by Cheapflights users on 12/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/163:23 pmBWI - SEA
1 stop8h 52mAmerican Airlines
Thu 1/212:31 amSEA - BWI
1 stop7h 51mAmerican Airlines
Deal found 12/2$406
This Southwest deal was found by Cheapflights users on 12/1. 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.
Tue 12/173:00 pmDCA - SEA
2 stops10h 55mSouthwest
Wed 1/1510:40 amSEA - DCA
1 stop9h 25mSouthwest
Deal found 12/1$431
This Southwest deal was found by Cheapflights users on 12/1. 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.
Thu 12/193:40 pmBWI - SEA
1 stop11h 45mSouthwest
Sat 1/46:10 pmSEA - BWI
1 stop14h 00mSouthwest
Deal found 12/1$436
This American Airlines deal was found by Cheapflights users on 12/1. 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.
Tue 12/315:13 pmDCA - SEA
1 stop9h 18mAmerican Airlines
Wed 1/221:43 pmSEA - DCA
1 stop7h 02mAmerican Airlines
Deal found 12/1$446

Find flights from Washington, D.C. to Seattle within your budget

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 2,650,959 searches. Data last updated December 2, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 1/7

5:30 am-12:10 am

1 stop21h 40m

Seattle/Tacoma Intl

Tue 1/21

5:55 pm-10:02 pm

1 stop25h 07m

$253

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 1/18

6:57 pm-10:00 pm

Nonstop6h 03m

Seattle/Tacoma Intl

Tue 1/21

9:54 am-5:57 pm

Nonstop5h 03m

$257

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 1/15

1:01 pm-3:35 pm

1 stop29h 34m

Seattle/Tacoma Intl

Wed 1/22

7:55 pm-8:59 pm

1 stop22h 04m

$259

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 1/11

1:52 pm-11:11 pm

2 stops12h 19m

Seattle/Tacoma Intl

Tue 1/21

11:50 am-10:41 pm

1 stop7h 51m

$261

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 1/11

5:30 pm-8:31 pm

Nonstop6h 01m

Seattle/Tacoma Intl

Tue 1/21

7:00 am-8:40 pm

1 stop10h 40m

$262

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 3/4

4:15 pm-10:38 pm

1 stop9h 23m

Seattle/Tacoma Intl

Wed 3/19

11:48 pm-10:47 am

1 stop7h 59m

$268

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 2/5

6:59 pm-10:00 pm

Nonstop6h 01m

Seattle/Tacoma Intl

Sun 2/9

9:52 am-5:59 pm

Nonstop5h 07m

$268

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sat 1/11

6:00 am-12:31 pm

1 stop9h 31m

Seattle/Tacoma Intl

Sat 1/25

6:15 am-5:36 pm

1 stop8h 21m

$271

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Fri 1/10

7:00 am-2:19 pm

1 stop10h 19m

Seattle/Tacoma Intl

Mon 1/13

3:15 pm-12:01 pm

1 stop17h 46m

$271

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 3/4

10:03 am-12:20 am

2 stops17h 17m

Seattle/Tacoma Intl

Thu 3/6

3:16 pm-11:30 am

1 stop17h 14m

$274

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/30

Showing 1-10 of 46 results
1
2
3
...
5

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
KAYAKPrice Accuracy1 starTrust Score*1 star

*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.

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.

Travel insights for flights from Washington, D.C. to Seattle

Get recent, data-driven insights about flights from Washington, D.C. to Seattle including ideal travel times, pricing trends, and more.

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 November 22, 2024.

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 December 2, 2024.

It’s typically best to fly out from Washington, D.C. to Seattle at noon. Doing so could potentially save you 29% 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 November 24, 2024.

Travelers seeking maximum savings on their Washington, D.C. to Seattle flight should consider departing on Friday 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 December 2, 2024.

The most flights from WAS to SEA are scheduled on a Sunday (30 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (14 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 December 2, 2024.
See what other customers who have flown with Delta, American Airlines and Alaska Airlines 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.
8.1
Very good
4,951 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

8.1
Very good
4,951 reviews
8.1
Very good
4,951 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

8.0
Very good
9,508 reviews
8.1
Very good
4,951 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

8.0
Very good
8,698 reviews
8.1
Very good
4,951 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

7.4
Good
3,350 reviews
8.1
Very good
4,951 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

7.4
Good
9,141 reviews
8.1
Very good
4,951 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

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. 10 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 21 inbound flights from Washington, D.C. per day.

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

    According to our current data, Alaska Airlines ($257), Spirit Airlines ($259), and American Airlines ($261) offers the cheapest pricing from Washington, D.C. to Seattle. You may be able to fly from Washington, D.C. to Seattle for 37% 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 United Airlines. According to our data, you can fly for as low as $139. Users have also found prices from $139 and $144 on Frontier and Alaska Airlines, respectively.

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

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

    Consider Singapore Airlines (100%), United Airlines (97%) or Air Tahiti Nui (95%) 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 $1,041, our data indicates the cheapest price to be $138. The most popular route (Washington, D.C. Dulles Intl - Seattle/Tacoma Intl), is priced around $272.

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

  • 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, 16th Street Mall, and Paramount Theatre. Coors Field, 16th Street Mall, and Paramount Theatre can be visited by traveling about 18.4 mi, 18.7 mi, and 18.6 mi respectively from Denver Intl. Travelers can rent a car at Denver Intl for an average daily rate of $59 to make sightseeing during their layover a little easier.

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

  • 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

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 9 airlines flying from Washington, D.C. to Seattle

Discover the top 9 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 2,650,959 searches. Data last updated December 2, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$90Average$250FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$144Average$370FlexibilityNo cancel feeOn-time83%
Spirit AirlinesCheapest$164Average$264FlexibilityNo cancel feeOn-time65%
DeltaCheapest$173Average$450FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$210Average$503FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$224Average$420FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$248Average$364FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$266Average$462FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$326Average$498FlexibilityNo cancel feeOn-time63%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.