Cheap flights from Seattle to Washington, D.C. from £111
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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Seattle to Washington, D.C.
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Washington, D.C. (WAS). 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 29 March 2025.
Round-trip from | £208 |
---|---|
One-way from | £111 |
Popular in | December |
Cheapest in | September |
Average price | £295 |
Good round-trip deal | £711 or less |
Good one-way deal | £146 or less |
Find flight deals from Seattle to Washington, D.C.
Cheapest flights from Seattle to Washington, D.C.Explore the most affordable flight options available from Seattle to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 March 2025.
Explore the most affordable flight options available from Seattle to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 March 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Seattle to Washington, D.C. 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 858,174 searches. Data last updated 29 March 2025.
Use the filters below to find and compare flights from Seattle to Washington, D.C. that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Tue 1/7
21:50-09:41
1 stop8h 51m
Washington, D.C. Reagan-National
Wed 9/7
12:40-22:10
1 stop12h 30m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Fri 18/4
07:25-15:31
Nonstop5h 06m
Washington, D.C. Reagan-National
Tue 22/4
16:50-19:51
Nonstop6h 01m
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
Thu 1/5
22:30-06:20
Nonstop4h 50m
Washington, D.C. Dulles Intl
Sun 4/5
07:25-10:20
Nonstop5h 55m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Fri 9/5
08:24-16:38
Nonstop5h 14m
Washington, D.C. Reagan-National
Wed 21/5
09:59-18:51
1 stop11h 52m
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
Thu 1/5
15:36-05:40
1 stop11h 04m
Washington, D.C. Dulles Intl
Tue 6/5
10:00-12:40
Nonstop5h 40m
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
Thu 17/4
23:50-11:23
1 stop8h 33m
Washington, D.C. Dulles Intl
Thu 24/4
12:37-10:32
1 stop24h 55m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Fri 9/5
07:00-20:58
1 stop10h 58m
Washington, D.C. Reagan-National
Wed 21/5
09:59-18:51
1 stop11h 52m
SeattleWashington, D.C.
SEA - DCA
SEADCA
Seattle/Tacoma Intl
Tue 29/4
07:08-21:05
2 stops10h 57m
Washington, D.C. Reagan-National
Wed 30/4
14:00-19:01
1 stop8h 01m
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
Fri 18/4
10:00-17:59
Nonstop4h 59m
Washington, D.C. Dulles Intl
Sun 27/4
06:30-09:13
Nonstop5h 43m
SeattleWashington, D.C.
SEA - IAD
SEAIAD
Seattle/Tacoma Intl
Fri 18/4
08:15-16:22
Nonstop5h 07m
Washington, D.C. Dulles Intl
Sun 20/4
17:30-20:21
Nonstop5h 51m
Best time to book a flight from Seattle to Washington, D.C.
Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Seattle with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Washington, D.C.
How far ahead should I book a flight from Seattle to Washington, D.C.?
Use this chart to determine the optimal time to book a return flight from Seattle to Washington, D.C.. Price data was last updated on 21 March 2025.
To ensure you get the cheapest price possible for a flight from Seattle to Washington, D.C., you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Seattle to Washington, D.C.?
Currently, February is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of £565). Flying from Seattle to Washington, D.C. in July is currently the most expensive (average of £946). 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 WAS?
Find hourly flight availability from Seattle to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 March 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Washington, D.C. as you normally would.
Weekly flight availability from Seattle to Washington, D.C.
Explore weekly flight availability from Seattle to Washington, D.C.. 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 29 March 2025.
The most flights from SEA to WAS are scheduled on a Friday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).
Rainfall in Washington, D.C. by month
Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.
Temperature in Washington, D.C. by month
Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Washington, D.C., 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).
Reviews of airlines servicing Washington, D.C.
Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated 29 March 2025.
Read through reviews of airlines operating flights from Seattle to Washington, D.C., such as Southwest, Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Ila,Mar 2025
HOU - DAL
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Ila,Mar 2025
HOU - DAL
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Ila,Mar 2025
HOU - DAL
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Ila,Mar 2025
HOU - DAL
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Ila,Mar 2025
HOU - DAL
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Ila,Mar 2025
HOU - DAL
Related info for your journey
Find useful and relevant information for your journey from Seattle to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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How does Cheapflights help users find flights from Seattle to Washington, D.C.?
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Why should you use Cheapflights to find cheap flight tickets from Seattle to Washington, D.C.?
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Can Cheapflights find flights from Seattle to Washington, D.C. with no change fees?
Need flexible booking options for your flight to Washington, D.C. from Seattle? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from Seattle to Washington, D.C. become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Washington, D.C. from Seattle today and book when prices fit your budget.