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District of Columbia

$144+ Cheap flights from Seattle (SEA) to District of Columbia

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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — IAD
may. 5 — may. 121
lun. 5/5
lun. 5/12
1 adult, Economy
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Cheap flight deals from Seattle to District of Columbia

Keep the following information in mind while searching for Seattle to District of Columbia flight deals. Data was last updated abril 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$221
(CheapOair)

One-way from

$144
(Hawaiian Airlines)

Popular in

December

Cheapest in

September

Average price

$391

Good round-trip deal

$353 or less

Good one-way deal

$189 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Washington, D.C. (WAS) flights.
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From Seattle/Tacoma Intl to District of Columbia
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One-way flight from Seattle/Tacoma Intl to District of Columbia
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Highest demand for flights based on searches. 6% potential increase in price ($27 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to District of Columbia.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to District of Columbia.
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Find flight deals from Seattle to District of Columbia

Cheapest flights from Seattle to District of Columbia
Explore the most affordable flight options available from Seattle to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 30, 2025.

This CheapOair deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/812:21 pmSEA - DCA
1 stop20h 46mFrontier
lun. 5/127:00 amDCA - SEA
1 stop20h 44mFrontier
Deal found 4/29$221
This CheapOair deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/58:22 pmSEA - IAD
1 stop31h 09mFrontier
jue. 5/157:31 amIAD - SEA
1 stop13h 29mFrontier
Deal found 4/29$221
This CheapTickets deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 6/711:30 pmSEA - IAD
Nonstop5h 06mAlaska Airlines
mar. 6/106:30 amIAD - SEA
Nonstop5h 40mAlaska Airlines
Deal found 4/29$233
This Trip.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 6/711:30 pmSEA - IAD
Nonstop5h 06mMultiple Airlines
mar. 6/106:30 amIAD - SEA
Nonstop5h 40mMultiple Airlines
Deal found 4/29$236
This Hawaiian Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/244:00 pmSEA - IAD
Nonstop4h 59mHawaiian Airlines
mié. 5/286:30 amIAD - SEA
Nonstop5h 40mHawaiian Airlines
Deal found 4/29$237
This Trip.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 6/71:48 pmSEA - DCA
Nonstop5h 11mMultiple Airlines
mar. 6/101:00 pmDCA - SEA
1 stop13h 37mMultiple Airlines
Deal found 4/29$239
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/241:48 pmSEA - DCA
Nonstop5h 11mAlaska Airlines
mié. 5/288:00 amDCA - SEA
Nonstop5h 39mAlaska Airlines
Deal found 4/28$257
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/2812:44 pmSEA - IAD
1 stop7h 06mUnited Airlines
mié. 6/46:48 amIAD - SEA
1 stop7h 44mUnited Airlines
Deal found 4/29$257
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/612:05 amSEA - DCA
1 stop7h 55mAmerican Airlines
mar. 6/102:37 pmDCA - SEA
1 stop8h 26mAmerican Airlines
Deal found 4/29$259
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 6/77:35 amSEA - DCA
Nonstop5h 14mDelta
mar. 6/104:40 pmDCA - SEA
Nonstop5h 58mDelta
Deal found 4/29$297
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/249:50 pmSEA - IAD
Nonstop5h 02mDelta
lun. 6/27:45 amIAD - SEA
Nonstop5h 48mDelta
Deal found 4/28$297
This Sun Country Air deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/1211:59 pmSEA - IAD
1 stop9h 26mSun Country Air
vie. 6/2012:16 pmIAD - SEA
1 stop13h 34mSun Country Air
Deal found 4/29$310

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to District of Columbia 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 2,558,603 searches. Data last updated abril 30, 2025.
Use the filters below to find and compare flights from Seattle to District of Columbia that are best for you.

Fly from

Seattle

Fly to

District of Columbia

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

sáb. 5/17

6:00 am-4:59 pm

1 stop7h 59m

Washington, D.C. Reagan-National

sáb. 5/24

6:00 pm-12:37 am

1 stop9h 37m

$221

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

lun. 5/5

8:22 pm-6:31 am

1 stop31h 09m

Washington, D.C. Dulles Intl

jue. 5/15

7:31 am-6:00 pm

1 stop13h 29m

$221

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

sáb. 5/24

6:25 am-4:59 pm

1 stop7h 34m

Washington, D.C. Reagan-National

mié. 5/28

5:00 pm-7:56 pm

Nonstop5h 56m

$223

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

sáb. 6/7

11:30 pm-7:36 am

Nonstop5h 06m

Washington, D.C. Dulles Intl

mar. 6/10

6:30 am-9:10 am

Nonstop5h 40m

$233

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

sáb. 6/7

11:30 pm-7:36 am

Nonstop5h 06m

Washington, D.C. Dulles Intl

mar. 6/10

6:30 am-9:10 am

Nonstop5h 40m

$236

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

sáb. 5/24

1:48 pm-9:59 pm

Nonstop5h 11m

Washington, D.C. Reagan-National

mié. 5/28

5:00 pm-7:56 pm

Nonstop5h 56m

$237

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

sáb. 5/24

4:00 pm-11:59 pm

Nonstop4h 59m

Washington, D.C. Dulles Intl

mié. 5/28

6:30 am-9:10 am

Nonstop5h 40m

$237

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

mié. 5/28

12:44 pm-10:50 pm

1 stop7h 06m

Washington, D.C. Dulles Intl

mié. 6/4

6:48 am-11:32 am

1 stop7h 44m

$257

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

sáb. 5/24

1:48 pm-9:59 pm

Nonstop5h 11m

Washington, D.C. Reagan-National

mié. 5/28

8:00 am-10:39 am

Nonstop5h 39m

$257

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

vie. 6/6

12:05 am-11:00 am

1 stop7h 55m

Washington, D.C. Reagan-National

mar. 6/10

2:37 pm-8:03 pm

1 stop8h 26m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 36 results
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Best time to book a flight from Seattle to District of Columbia

Have a flexible travel schedule? Discover the best time to fly to District of Columbia 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 District of Columbia

What is the cheapest month to book a flight from Seattle to District of Columbia?

Currently, August is the cheapest month in which you can book a flight from Seattle to District of Columbia (average of $309). Flying from Seattle to District of Columbia in June is currently the most expensive (average of $373). 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 DC?

Find hourly flight availability from Seattle to District of Columbia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to District of Columbia as you normally would.

Weekly flight availability from Seattle to District of Columbia

Explore weekly flight availability from Seattle to District of Columbia. 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 abril 30, 2025.

The most flights from SEA to USDC are scheduled on a Wednesday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in District of Columbia ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit District of Columbia when rainfall is around 2.6 in.

Temperature in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to District of Columbia, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing District of Columbia

Get insights into the airlines that provide service to District of Columbia. 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 District of Columbia. Reviews last updated abril 30, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Seattle to District of Columbia have to say. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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
4,295 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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
7,936 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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
2,406 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

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 District of Columbia. 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 District of Columbia?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to District of Columbia. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • What are the cheapest airlines to fly from Seattle to District of Columbia one-way?

    For one-way options, check prices for Hawaiian Airlines. According to our data, you can fly for as low as $144. Users have also found prices from $144 and $148 on Delta and Sun Country Air, respectively.

  • What are the most reliable airlines from Seattle to District of Columbia?

    Before booking your flight to District of Columbia from Seattle, check out the most reliable airlines to get you to your destination on time: Ethiopian Air (93%), Lufthansa (92%), Austrian Airlines( 92%).

  • What are the cheapest flights from Seattle to District of Columbia?

    While on average a flight from Seattle to District of Columbia is generally $932, our data shows the cheapest flight currently is $143. When looking at the most popular route, (Seattle/Tacoma Intl - Washington, D.C. Dulles Intl), you can expect to pay $237 for that flight.

  • Can I find deals for flights from Seattle to District of Columbia that include hotel bookings?

    Yes. In addition to deals on Seattle to District of Columbia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to District of Columbia?

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

  • Can I find deals for business class flights from Seattle to District of Columbia?

    Yes. Cheapflights offers flight deals from Seattle to District of Columbia 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 District of Columbia?

    Currently, August is the cheapest month in which you can book a flight from Seattle to District of Columbia (average of $309). Flying from Seattle to District of Columbia in June is currently the most expensive (average of $373). 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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Alternative routes for Seattle to District of Columbia

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Top 9 airlines flying from Seattle to District of Columbia

Discover the top 9 airlines that operate flights from Seattle to District of Columbia. 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 2,558,603 searches. Data last updated abril 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$86Average$237FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$143Average$437FlexibilityNo cancel feeOn-time85%
Sun Country AirCheapest$169Average$534FlexibilityNo cancel feeOn-time83%
Spirit AirlinesCheapest$178Average$267FlexibilityNo cancel feeOn-time65%
DeltaCheapest$200Average$408FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$206Average$444FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$242Average$427FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$243Average$496FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$321Average$474FlexibilityNo cancel feeOn-time63%

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