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Cheap flights from Seattle to Washington, D.C. Reagan-National Airport from C$ 200

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 21/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DCA
20 Apr — 27 Apr1
1 adult

Cheap flight deals from Seattle to Reagan-National

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Reagan-National (DCA). 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 15 April 2025.

Round-trip from

C$ 399

One-way from

C$ 200

Popular in

December

Cheapest in

September

Average price

C$ 677
Delta
  • Delta
  • 6/5-13/5
  • Nonstop
  • 10h 57m total
  • Seattle to Washington, D.C.
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Delta
  • Delta
  • 21/5
  • Nonstop
  • 5h 14m total
  • Seattle to Washington, D.C.
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Highest demand for flights based on searches. 0% potential increase in price (C$ 6 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 28 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Seattle to Reagan-National

Cheapest flights from Seattle to Reagan-National
Explore the most affordable flight options available from Seattle to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Tue 6/57:25 a.m.SEA - DCA
Nonstop5h 06mDelta
Tue 13/54:59 p.m.DCA - SEA
Nonstop5h 51mDelta
Deal found 15/4C$ 399
Sat 10/51:50 p.m.SEA - DCA
Nonstop5h 09mAlaska Airlines
Wed 14/59:59 a.m.DCA - SEA
1 stop11h 52mAlaska Airlines
Deal found 15/4C$ 413
Fri 9/51:50 p.m.SEA - DCA
Nonstop5h 09mHawaiian Airlines
Wed 21/59:59 a.m.DCA - SEA
1 stop11h 52mHawaiian Airlines
Deal found 14/4C$ 476
Thu 14/810:45 p.m.SEA - DCA
1 stop9h 20mSouthwest
Sat 23/82:00 p.m.DCA - SEA
2 stops10h 30mSouthwest
Deal found 15/4C$ 503
Tue 13/58:50 a.m.SEA - DCA
2 stops9h 15mUnited Airlines
Tue 20/54:37 p.m.DCA - SEA
1 stop9h 13mUnited Airlines
Deal found 15/4C$ 527
Tue 15/79:50 p.m.SEA - DCA
1 stop9h 48mJetBlue
Fri 25/712:40 p.m.DCA - SEA
1 stop12h 30mJetBlue
Deal found 15/4C$ 633
Thu 26/612:20 a.m.SEA - DCA
1 stop8h 39mMultiple Airlines
Fri 4/75:02 p.m.DCA - SEA
Nonstop5h 58mMultiple Airlines
Deal found 14/4C$ 901

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Reagan-National 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 15 April 2025.
Use the filters below to find and compare flights from Seattle to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Seattle

Fly to

Reagan-National

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 6/5

7:25 a.m.-3:31 p.m.

Nonstop5h 06m

Washington, D.C. Reagan-National

Tue 13/5

4:59 p.m.-7:50 p.m.

Nonstop5h 51m

C$ 399

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 10/5

1:50 p.m.-9:59 p.m.

Nonstop5h 09m

Washington, D.C. Reagan-National

Wed 14/5

9:59 a.m.-6:51 p.m.

1 stop11h 52m

C$ 413

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 9/5

1:50 p.m.-9:59 p.m.

Nonstop5h 09m

Washington, D.C. Reagan-National

Wed 21/5

9:59 a.m.-6:51 p.m.

1 stop11h 52m

C$ 476

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 14/8

10:45 p.m.-11:05 a.m.

1 stop9h 20m

Washington, D.C. Reagan-National

Sat 23/8

2:00 p.m.-9:30 p.m.

2 stops10h 30m

C$ 503

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 13/5

8:50 a.m.-9:05 p.m.

2 stops9h 15m

Washington, D.C. Reagan-National

Tue 20/5

4:37 p.m.-10:50 p.m.

1 stop9h 13m

C$ 527

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 15/7

9:50 p.m.-10:38 a.m.

1 stop9h 48m

Washington, D.C. Reagan-National

Fri 25/7

12:40 p.m.-10:10 p.m.

1 stop12h 30m

C$ 633

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 26/6

12:20 a.m.-11:59 a.m.

1 stop8h 39m

Washington, D.C. Reagan-National

Fri 4/7

5:02 p.m.-8:00 p.m.

Nonstop5h 58m

C$ 901

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 21/5

7:35 a.m.-3:49 p.m.

Nonstop5h 14m

C$ 200

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 24/5

1:48 p.m.-9:59 p.m.

Nonstop5h 11m

C$ 207

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 13/6

9:50 p.m.-8:39 a.m.

1 stop7h 49m

C$ 216

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/4

Showing 1-10 of 13 results
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Best time to book a flight from Seattle to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National 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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Washington, D.C. Reagan-National Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Reagan-National. Price data was last updated on 11 April 2025.

The best time to book flights from Seattle to Washington, D.C. Reagan-National Airport is 17 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 Seattle to Washington, D.C. Reagan-National Airport?

Currently, March is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of C$ 263). Flying from Seattle to Washington, D.C. Reagan-National Airport in June is currently the most expensive (average of C$ 375). 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 DCA?

Find hourly flight availability from Seattle to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 April 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Washington, D.C. Reagan-National Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 57% on your trip compared to booking a flight at noon.

Weekly flight availability from Seattle to Washington, D.C. Reagan-National Airport

Explore weekly flight availability from Seattle to Reagan-National. 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 15 April 2025.

The most flights from SEA to DCA are scheduled on a Monday (9 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (8 on average).

Rainfall in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport 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. Reagan-National Airport when rainfall is around 66.0 mm.

Temperature in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Reagan-National Airport, 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 Reagan-National

Get insights into the airlines that provide service to Reagan-National. 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 Reagan-National. Reviews last updated 15 April 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Seattle to Washington, D.C. to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
9,871 reviews
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,918 reviews
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Hawaiian Airlines
7.9
Good
2,375 reviews
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,658 reviews
Alaska Airlines
8.0
Very good
9,871 reviews
Check prices

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Related info for your journey

Find useful and relevant information for your journey from Seattle to Reagan-National. 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. Reagan-National?

    If you book a flight to Washington, D.C. Reagan-National from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 18.4 km from the centre of Seattle. There are 8 flights from Seattle/Tacoma Intl to Washington, D.C. Reagan-National per day from 0 different airlines.

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

    Flying on Delta is currently your cheapest option to Washington, D.C. Reagan-National Airport, with prices starting at C$ 399. Additional round-trip tickets that might be worth considering are offered by Alaska Airlines and Hawaiian Airlines, with the lowest prices starting at C$ 413 and C$ 476, respectively. Users have found that Delta is 42% cheaper than the other options available to this destination.

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

    C$ 200 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Hawaiian Airlines and JetBlue, with prices starting from C$ 207 and C$ 216, respectively.

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

    No one likes to see their flight delayed. When booking a flight from Seattle to Washington, D.C. Reagan-National Airport consider choosing LATAM Airlines (96%), Kenya Airways (96%) or Virgin Atlantic (96%) as they are the most reliable in getting you off to your destination on time.

  • Can I find deals for flights from Seattle to Reagan-National that include hotel bookings?

    Yes. In addition to deals on Seattle to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Reagan-National?

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

  • Can I find deals for business class flights from Seattle to Reagan-National?

    Yes. Cheapflights offers flight deals from Seattle to Reagan-National 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. Reagan-National Airport?

    Currently, March is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of C$ 263). Flying from Seattle to Washington, D.C. Reagan-National Airport in June is currently the most expensive (average of C$ 375). 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.

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