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Cheap flights from Seattle to Washington, D.C. Reagan-National Airport from C$ 206

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DCA
13 Mar — 20 Mar1
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 8 March 2025.

Round-trip from

C$ 376

One-way from

C$ 206

Popular in

December

Cheapest in

September

Average price

C$ 685
Frontier
  • Frontier
  • 17/4-21/4
  • 2 total stops
  • 33h 49m total
  • Seattle to Washington, D.C.
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Hawaiian Airlines
  • Hawaiian Airlines
  • 9/4
  • Nonstop
  • 4h 51m total
  • Seattle to Washington, D.C.
Search Deals
High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 2% potential price decrease (C$ 27 potential savings vs. average RT price).
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Average for round-trip flights in March 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 8 March 2025.

Thu 17/41:56 p.m.SEA - DCA
1 stop19h 08mFrontier
Mon 21/41:03 p.m.DCA - SEA
1 stop14h 41mFrontier
Deal found 7/3C$ 376
Tue 1/42:08 p.m.SEA - DCA
Nonstop4h 51mMultiple Airlines
Wed 30/46:00 p.m.DCA - SEA
1 stop9h 44mMultiple Airlines
Deal found 7/3C$ 409
Tue 22/47:25 a.m.SEA - DCA
Nonstop5h 06mDelta
Thu 24/44:50 p.m.DCA - SEA
Nonstop6h 01mDelta
Deal found 7/3C$ 411
Tue 8/42:08 p.m.SEA - DCA
Nonstop4h 51mAlaska Airlines
Tue 22/49:00 a.m.DCA - SEA
1 stop10h 49mAlaska Airlines
Deal found 7/3C$ 426
Sun 30/311:59 p.m.SEA - DCA
1 stop7h 54mUnited Airlines
Fri 4/46:00 a.m.DCA - SEA
1 stop10h 08mUnited Airlines
Deal found 6/3C$ 440
Mon 31/312:59 a.m.SEA - DCA
1 stop8h 16mAmerican Airlines
Wed 30/45:59 p.m.DCA - SEA
1 stop8h 10mAmerican Airlines
Deal found 7/3C$ 441
Tue 8/45:00 a.m.SEA - DCA
2 stops10h 35mSouthwest
Wed 9/49:35 a.m.DCA - SEA
1 stop10h 15mSouthwest
Deal found 7/3C$ 447
Tue 20/57:00 a.m.SEA - DCA
1 stop11h 10mHawaiian Airlines
Wed 28/58:35 a.m.DCA - SEA
1 stop11h 13mHawaiian Airlines
Deal found 7/3C$ 460
Mon 24/311:48 p.m.SEA - DCA
1 stop11h 10mJetBlue
Tue 1/41:00 p.m.DCA - SEA
1 stop12h 27mJetBlue
Deal found 7/3C$ 505

Find flights from Seattle to Reagan-National within your budget

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 8 March 2025.

Fly from

Seattle

Fly to

Reagan-National

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 17/4

1:56 p.m.-12:04 p.m.

1 stop19h 08m

Washington, D.C. Reagan-National

Mon 21/4

1:03 p.m.-12:44 a.m.

1 stop14h 41m

C$ 376

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 1/4

2:08 p.m.-9:59 p.m.

Nonstop4h 51m

Washington, D.C. Reagan-National

Wed 30/4

6:00 p.m.-12:44 a.m.

1 stop9h 44m

C$ 409

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 22/4

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

Nonstop5h 06m

Washington, D.C. Reagan-National

Thu 24/4

4:50 p.m.-7:51 p.m.

Nonstop6h 01m

C$ 411

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 8/4

2:08 p.m.-9:59 p.m.

Nonstop4h 51m

Washington, D.C. Reagan-National

Wed 23/4

9:00 a.m.-4:49 p.m.

1 stop10h 49m

C$ 426

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sun 30/3

11:59 p.m.-10:53 a.m.

1 stop7h 54m

Washington, D.C. Reagan-National

Fri 4/4

6:00 a.m.-1:08 p.m.

1 stop10h 08m

C$ 440

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Mon 31/3

12:59 a.m.-12:15 p.m.

1 stop8h 16m

Washington, D.C. Reagan-National

Wed 30/4

5:59 p.m.-11:09 p.m.

1 stop8h 10m

C$ 441

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 8/4

5:00 a.m.-6:35 p.m.

2 stops10h 35m

Washington, D.C. Reagan-National

Wed 9/4

9:35 a.m.-4:50 p.m.

1 stop10h 15m

C$ 447

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 20/5

7:00 a.m.-9:10 p.m.

1 stop11h 10m

Washington, D.C. Reagan-National

Wed 28/5

8:35 a.m.-4:48 p.m.

1 stop11h 13m

C$ 460

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Mon 24/3

11:48 p.m.-1:58 p.m.

1 stop11h 10m

Washington, D.C. Reagan-National

Tue 1/4

1:00 p.m.-10:27 p.m.

1 stop12h 27m

C$ 505

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 9/4

7:23 a.m.-3:29 p.m.

Nonstop5h 06m

C$ 206

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/3

Showing 1-10 of 16 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.

Travel insights for flights from Seattle to Reagan-National

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

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 28 February 2025.

The best time to book flights from Seattle to Washington, D.C. Reagan-National Airport is 16 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$ 384). 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 8 March 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 56% on your trip compared to booking a flight at noon.

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 8 March 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,314 reviews
Check prices

Entertainment

7.6

Overall

8.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest
8.1
Very good
4,314 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Entertainment

7.6

Overall

8.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Alaska Airlines
8.0
Very good
9,716 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Entertainment

7.6

Overall

8.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta
8.0
Very good
8,024 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Entertainment

7.6

Overall

8.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Hawaiian Airlines
7.9
Good
2,318 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Entertainment

7.6

Overall

8.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines
7.4
Good
8,649 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Entertainment

7.6

Overall

8.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 6 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 Frontier is currently your cheapest option to Washington, D.C. Reagan-National Airport, with prices starting at C$ 376. Additional round-trip tickets that might be worth considering are offered by Delta and Alaska Airlines, with the lowest prices starting at C$ 411 and C$ 426, respectively. Users have found that Frontier is 48% 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$ 206 is the cheapest one-way deal found within the past few days, from Hawaiian Airlines. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from C$ 221 and C$ 226, 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 Japan Airlines (67%), Korean Air (67%) or Alaska Airlines (66%) 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$ 384). 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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