Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Seattle to Washington, D.C. from £110

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 1/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — WAS
8 Dec — 15 Dec1
1 adult

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 3 December 2024.

Round-trip from

£193

One-way from

£110

Popular in

December

Cheapest in

February
Frontier
  • Frontier
  • 26/2-28/2
  • 1 total stop
  • 13h 30m total
  • Seattle to Washington, D.C.
Search Deals
United Airlines
  • United Airlines
  • 1/3
  • Nonstop
  • 4h 59m total
  • Seattle to Washington, D.C.
Search Deals
High demand for flights, 15% potential price rise
Search Deals
Best time to find cheap flights, 20% potential price drop
Search Deals

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 3 December 2024.

Tue 31/1223:15SEA - IAD
Nonstop4h 52mUnited Airlines
Tue 7/110:05IAD - SEA
1 stop11h 10mUnited Airlines
Deal found 3/12£258
Wed 25/1222:08SEA - IAD
Nonstop5h 02mDelta
Wed 8/116:05IAD - SEA
Nonstop6h 01mDelta
Deal found 1/12£266
Tue 31/1221:39SEA - IAD
Nonstop5h 01mAlaska Airlines
Tue 7/118:57IAD - SEA
Nonstop6h 03mAlaska Airlines
Deal found 3/12£290
Tue 31/1213:55SEA - DCA
1 stop7h 04mUnited Airlines
Tue 7/118:05DCA - SEA
1 stop7h 48mUnited Airlines
Deal found 2/12£301
Wed 25/1207:40SEA - DCA
1 stop7h 14mAlaska Airlines
Wed 8/109:00DCA - SEA
1 stop9h 53mAlaska Airlines
Deal found 1/12£315
Thu 19/1206:30SEA - DCA
2 stops11h 20mSouthwest
Wed 5/206:55DCA - SEA
1 stop7h 55mSouthwest
Deal found 1/12£364
Thu 19/1207:40SEA - IAD
2 stops13h 15mSouthwest
Wed 5/215:55IAD - SEA
1 stop9h 35mSouthwest
Deal found 1/12£377
Thu 19/1205:15SEA - DCA
1 stop7h 50mDelta
Tue 4/209:55DCA - SEA
1 stop15h 30mDelta
Deal found 1/12£391

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

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 927,803 searches. Data last updated 3 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 26/2

14:05-21:59

Nonstop4h 54m

Washington, D.C. Reagan-National

Fri 28/2

07:00-12:36

1 stop8h 36m

£193

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Tue 21/1

07:10-15:10

Nonstop5h 00m

Washington, D.C. Dulles Intl

Sat 1/2

16:05-19:06

Nonstop6h 01m

£203

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Tue 14/1

07:00-20:40

1 stop10h 40m

Washington, D.C. Dulles Intl

Wed 15/1

17:30-20:31

Nonstop6h 01m

£207

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Tue 21/1

09:54-17:57

Nonstop5h 03m

Washington, D.C. Dulles Intl

Tue 28/1

17:25-09:30

1 stop19h 05m

£210

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 7/3

23:48-13:59

1 stop11h 11m

Washington, D.C. Reagan-National

Tue 11/3

16:15-22:38

1 stop9h 23m

£211

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 25/1

11:05-22:47

1 stop8h 42m

Washington, D.C. Reagan-National

Sat 8/2

07:02-13:22

1 stop9h 20m

£218

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 25/2

00:43-11:59

1 stop8h 16m

Washington, D.C. Reagan-National

Fri 28/2

17:55-23:06

1 stop8h 11m

£229

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 25/1

08:24-16:29

Nonstop5h 05m

Washington, D.C. Reagan-National

Tue 28/1

17:29-20:35

Nonstop6h 06m

£234

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 17/1

11:30-23:50

1 stop9h 20m

Washington, D.C. Reagan-National

Wed 22/1

16:00-22:40

2 stops9h 40m

£253

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Thu 9/1

10:00-23:05

1 stop10h 05m

Washington, D.C. Dulles Intl

Wed 15/1

11:10-23:20

2 stops15h 10m

£314

Flights are sorted by cheapest return flights first.

Deals found on 2/12

Showing 1-10 of 21 results
1
2
3

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.
Estimated return 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 Seattle to Washington, D.C.

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

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 22 November 2024.

To ensure you get the cheapest price possible for a flight from Seattle to Washington, D.C., you should look to book at least 57 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, January is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of £599). Flying from Seattle to Washington, D.C. in July is currently the most expensive (average of £898). 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 3 December 2024.

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 3 December 2024.

The most flights from SEA to WAS are scheduled on a Monday (28 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 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 3 December 2024.
Read through reviews of airlines operating flights from Seattle to Washington, D.C., such as Southwest, Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very Good
4,951 reviews
Check prices

Boarding

8.2

Food

7.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

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

Southwest
8.1
Very Good
4,951 reviews
Southwest
8.1
Very Good
4,951 reviews
Check prices

Boarding

8.2

Food

7.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

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

Alaska Airlines
8.0
Very Good
9,508 reviews
Southwest
8.1
Very Good
4,951 reviews
Check prices

Boarding

8.2

Food

7.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

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

Delta
8.0
Very Good
8,698 reviews
Southwest
8.1
Very Good
4,951 reviews
Check prices

Boarding

8.2

Food

7.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

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

JetBlue
7.4
Good
3,350 reviews
Southwest
8.1
Very Good
4,951 reviews
Check prices

Boarding

8.2

Food

7.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

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

United Airlines
7.4
Good
9,141 reviews
Southwest
8.1
Very Good
4,951 reviews
Check prices

Boarding

8.2

Food

7.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

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 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.

  • What airport do you fly from for flights from Seattle to Washington, D.C.?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Washington, D.C. from Seattle. Booking flights from Seattle/Tacoma Intl (SEA) to Washington, D.C. should be relatively easy as there are 13 daily outbound flights to Washington, D.C. from 0 different airlines.

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

    Flying on Delta is currently your cheapest option to Washington, D.C., with prices starting at £203. Additional return tickets that might be worth considering are offered by United Airlines and Alaska Airlines, with the lowest prices starting at £207 and £210, respectively. Delta is 36% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapet airlines for a one-way flight from Seattle to Washington, D.C. are United Airlines (£110), JetBlue (£110), and Delta (£114).

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

    Consider Copa Airlines (97%), Ethiopian Air (96%) or Avianca (95%) when booking your flight. These represent the most reliable airlines when flying from Seattle to Washington, D.C..

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of £599). Flying from Seattle to Washington, D.C. in July is currently the most expensive (average of £898). 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.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Washington, D.C.?

Cheapflights helps you search for flights from Seattle to Washington, D.C. via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Washington, D.C.?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Washington, D.C..

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.

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.
View all available airlines