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Cheap flights from Seattle to Washington, D.C. from C$ 207

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 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — WAS
22 Jan — 29 Jan1
1 adult

The best prices from Seattle/Tacoma Intl to Washington, D.C. are usually found in September or February, booked 65 days in advance, depart on a Saturday or Tuesday and return on a Tuesday

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 17 January 2025.

Round-trip from

C$ 412

One-way from

C$ 207

Popular in

December

Cheapest in

September

Average price

C$ 588
Alaska Airlines
  • Alaska Airlines
  • 6/2-10/2
  • Nonstop
  • 11h 06m total
  • Seattle to Washington, D.C.
Search Deals
Delta
  • Delta
  • 20/4
  • Nonstop
  • 5h 06m total
  • Seattle to Washington, D.C.
Search Deals
High demand for flights, 7% potential price rise
Search Deals
Best time to find cheap flights, 2% potential price drop
Search Deals
Average for round-trip flights in January 2025
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 17 January 2025.

Thu 6/29:54 a.m.SEA - IAD
Nonstop5h 03mAlaska Airlines
Mon 10/26:57 p.m.IAD - SEA
Nonstop6h 03mAlaska Airlines
Deal found 16/1C$ 412
Wed 5/27:00 a.m.SEA - IAD
1 stop10h 40mUnited Airlines
Sun 9/25:30 p.m.IAD - SEA
Nonstop6h 01mUnited Airlines
Deal found 15/1C$ 414
Tue 11/211:17 p.m.SEA - DCA
1 stop8h 14mUnited Airlines
Wed 12/23:30 p.m.DCA - SEA
1 stop10h 23mUnited Airlines
Deal found 16/1C$ 420
Wed 24/91:45 p.m.SEA - DCA
Nonstop5h 10mAlaska Airlines
Sat 27/95:30 p.m.DCA - SEA
Nonstop5h 55mAlaska Airlines
Deal found 16/1C$ 427
Sat 22/26:15 a.m.SEA - DCA
1 stop14h 05mDelta
Wed 26/26:05 a.m.DCA - SEA
1 stop13h 49mDelta
Deal found 16/1C$ 438
Mon 24/211:48 p.m.SEA - DCA
1 stop8h 56mJetBlue
Mon 3/33:50 p.m.DCA - SEA
1 stop9h 48mJetBlue
Deal found 16/1C$ 447
Sun 9/310:00 p.m.SEA - IAD
Nonstop5h 00mDelta
Wed 12/37:30 a.m.IAD - SEA
Nonstop6h 07mDelta
Deal found 14/1C$ 448
Thu 20/25:05 a.m.SEA - DCA
2 stops10h 35mSouthwest
Wed 26/26:55 a.m.DCA - SEA
1 stop7h 55mSouthwest
Deal found 16/1C$ 477
Sat 24/58:45 a.m.SEA - IAD
1 stop24h 02mSun Country Air
Mon 2/612:45 p.m.IAD - SEA
1 stop25h 00mSun Country Air
Deal found 15/1C$ 489
Wed 19/36:40 a.m.SEA - IAD
2 stops13h 45mSouthwest
Mon 24/33:35 p.m.IAD - SEA
1 stop12h 15mSouthwest
Deal found 15/1C$ 650
Sun 2/212:45 a.m.SEA - DCA
2 stops12h 44mAmerican Airlines
Wed 5/27:59 p.m.DCA - SEA
1 stop30h 27mAmerican Airlines
Deal found 16/1C$ 744

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

Customize 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 629,999 searches. Data last updated 17 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Thu 6/2

9:54 a.m.-5:57 p.m.

Nonstop5h 03m

Washington, D.C. Dulles Intl

Mon 10/2

6:57 p.m.-10:00 p.m.

Nonstop6h 03m

C$ 412

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 5/2

7:00 a.m.-8:40 p.m.

1 stop10h 40m

Washington, D.C. Dulles Intl

Sun 9/2

5:30 p.m.-8:31 p.m.

Nonstop6h 01m

C$ 414

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 11/2

11:17 p.m.-10:31 a.m.

1 stop8h 14m

Washington, D.C. Reagan-National

Wed 12/2

3:30 p.m.-10:53 p.m.

1 stop10h 23m

C$ 420

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 22/2

6:15 a.m.-11:20 p.m.

1 stop14h 05m

Washington, D.C. Reagan-National

Tue 25/2

7:34 a.m.-4:54 p.m.

1 stop12h 20m

C$ 438

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Tue 18/2

7:28 a.m.-3:28 p.m.

Nonstop5h 00m

Washington, D.C. Dulles Intl

Sat 22/2

4:23 p.m.-7:24 p.m.

Nonstop6h 01m

C$ 441

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Mon 24/2

11:48 p.m.-11:44 a.m.

1 stop8h 56m

Washington, D.C. Reagan-National

Mon 3/3

3:50 p.m.-10:38 p.m.

1 stop9h 48m

C$ 447

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 25/2

2:05 p.m.-9:59 p.m.

Nonstop4h 54m

Washington, D.C. Reagan-National

Tue 4/3

8:00 a.m.-11:06 a.m.

Nonstop6h 06m

C$ 456

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 20/2

5:05 a.m.-6:40 p.m.

2 stops10h 35m

Washington, D.C. Reagan-National

Wed 26/2

6:55 a.m.-11:50 a.m.

1 stop7h 55m

C$ 477

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 24/5

8:45 a.m.-11:47 a.m.

1 stop24h 02m

Washington, D.C. Dulles Intl

Mon 2/6

12:45 p.m.-10:45 a.m.

1 stop25h 00m

C$ 489

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 19/3

5:15 a.m.-6:10 p.m.

1 stop9h 55m

Washington, D.C. Dulles Intl

Mon 24/3

3:35 p.m.-12:30 a.m.

2 stops11h 55m

C$ 650

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/1

Showing 1-10 of 22 results
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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 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 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 round-trip flight from Seattle to Washington, D.C.. Price data was last updated on 10 January 2025.

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 C$ 327). Flying from Seattle to Washington, D.C. in March is currently the most expensive (average of C$ 421). 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 17 January 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 58% on flights from Seattle to Washington, D.C. by exploring options for tickets in the afternoon.

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 17 January 2025.

The most flights from SEA to WAS are scheduled on a Thursday (24 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (14 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 mm 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 17 January 2025.
Get a feel of what it's like to fly with United Airlines, Delta and Southwest from Seattle to Washington, D.C. by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,659 reviews
Check prices

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,659 reviews
Southwest
8.1
Very good
4,659 reviews
Check prices

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,681 reviews
Southwest
8.1
Very good
4,659 reviews
Check prices

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,511 reviews
Southwest
8.1
Very good
4,659 reviews
Check prices

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,199 reviews
Southwest
8.1
Very good
4,659 reviews
Check prices

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,964 reviews
Southwest
8.1
Very good
4,659 reviews
Check prices

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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.?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Seattle/Tacoma Intl; the airport handles an average of 18 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 2 airlines have flights from the Seattle airport to Washington, D.C.. It is only a 18.4 km journey to Seattle/Tacoma Intl (SEA) from Seattle’s city centre.

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

    This flight path from Seattle/Tacoma Intl to Washington, D.C. was viewed by 15 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Currently priced at C$ 412, Alaska Airlines will fly you from Seattle to Washington, D.C. and back. In addition to Alaska Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Delta - these airlines can fly you to your destination from C$ 414 and C$ 438, respectively. These flights start at 29% lower than the current average price 3 months from now.

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

    For one-way options, check prices for Delta. According to our data, you can fly for as low as C$ 207. Users have also found prices from C$ 207 and C$ 214 on Alaska Airlines and American Airlines, respectively.

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

    Before booking your flight to Washington, D.C. from Seattle, check out the most reliable airlines to get you to your destination on time: Alaska Airlines (90%), Hawaiian Airlines (89%), Air Tahiti Nui( 85%).

  • 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 vacation 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, February is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of C$ 327). Flying from Seattle to Washington, D.C. in March is currently the most expensive (average of C$ 421). 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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Herndon
Arlington
Hanover
Fairfax
Bel Air
Falls Church
Manassas
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Alternative routes for Seattle to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Reagan-National flights
Seattle to Dulles Intl flights

Top 2 airlines flying from Seattle to Washington, D.C.

Discover the top 2 airlines that operate flights from Seattle to Washington, D.C.. 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 629,999 searches. Data last updated 17 January 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 264AverageC$ 637FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapestC$ 617AverageC$ 1,233FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

When you search for this flight from Seattle to Washington, D.C., Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Washington, D.C. for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Washington, D.C. with no change fees?

Yes, we can. To see specific flights from Seattle to Washington, D.C. with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Washington, D.C. become cheaper?

Yes, Cheapflights offers price alerts on Seattle to Washington, D.C. flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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