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$130+ Cheap flights from District of Columbia to Seattle (SEA)

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 3/13. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SEA
ene. 14 — ene. 211
mié. 1/14
mié. 1/21
1 adult, Economy
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Cheap flight deals from District of Columbia to Seattle

Cheapest flights from District of Columbia to Seattle
Explore the most affordable flight options available from District of Columbia to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 15, 2025.

This Mytrip deal was found by Cheapflights users on 12/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/182:00 pmDCA - SEA
1 stop25h 30mFrontier
mar. 12/232:54 pmSEA - DCA
1 stop28h 05mFrontier
Deal found 12/13$363
This CheapOair deal was found by Cheapflights users on 12/13. 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. 12/182:00 pmDCA - SEA
1 stop25h 30mFrontier
jue. 12/251:25 pmSEA - DCA
1 stop20h 36mFrontier
Deal found 12/13$364
This CheapOair deal was found by Cheapflights users on 12/14. 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.
mar. 12/236:00 pmDCA - SEA
1 stop21h 30mFrontier
dom. 1/42:54 pmSEA - DCA
1 stop19h 07mFrontier
Deal found 12/14$368
This CheapOair deal was found by Cheapflights users on 12/14. 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.
mar. 12/236:00 pmDCA - SEA
1 stop21h 30mFrontier
jue. 12/251:25 pmSEA - DCA
1 stop29h 34mFrontier
Deal found 12/14$384
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/228:00 amDCA - SEA
2 stops32h 54mFrontier
lun. 1/52:54 pmSEA - DCA
1 stop19h 08mFrontier
Deal found 12/15$395
This CheapOair deal was found by Cheapflights users on 12/14. 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.
vie. 12/196:00 pmDCA - SEA
1 stop21h 36mFrontier
vie. 1/912:26 pmSEA - DCA
1 stop21h 35mFrontier
Deal found 12/14$398
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/222:00 pmDCA - SEA
2 stops26h 54mFrontier
dom. 1/1112:26 pmSEA - DCA
1 stop21h 35mFrontier
Deal found 12/15$408
This CheapOair deal was found by Cheapflights users on 12/15. 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.
sáb. 12/206:00 pmDCA - SEA
1 stop21h 30mFrontier
sáb. 12/272:54 pmSEA - DCA
1 stop19h 07mFrontier
Deal found 12/15$413
This CheapOair deal was found by Cheapflights users on 12/15. 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.
sáb. 12/206:00 pmDCA - SEA
1 stop21h 30mFrontier
jue. 1/11:25 pmSEA - DCA
1 stop24h 34mFrontier
Deal found 12/15$414
This CheapOair deal was found by Cheapflights users on 12/14. 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. 12/252:00 pmDCA - SEA
1 stop25h 30mFrontier
dom. 1/42:54 pmSEA - DCA
1 stop19h 07mFrontier
Deal found 12/14$418
This American Airlines deal was found by Cheapflights users on 12/13. 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.
mié. 12/311:44 pmDCA - SEA
1 stop10h 26mAmerican Airlines
mié. 1/77:35 amSEA - DCA
1 stop8h 06mAmerican Airlines
Deal found 12/13$426
This CheapOair deal was found by Cheapflights users on 12/14. 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.
vie. 12/196:00 pmDCA - SEA
1 stop21h 36mFrontier
jue. 1/11:25 pmSEA - DCA
1 stop20h 36mFrontier
Deal found 12/14$434

Find flight deals from District of Columbia to Seattle

Keep the following information in mind while searching for District of Columbia to Seattle flight deals. Data was last updated diciembre 15, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$209
(Delta)

One-way from

$130
(Delta)

Popular in

December

Cheapest in

September

Average price

$461

Good round-trip deal

$312 or less

Good one-way deal

$189 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Seattle/Tacoma Intl flights.
Search Deals
From District of Columbia to Seattle/Tacoma Intl
Search Deals
One-way flight from District of Columbia to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($8 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from District of Columbia to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from District of Columbia to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from District of Columbia to Seattle 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 diciembre 15, 2025.
Use the filters below to find and compare flights from District of Columbia to Seattle that are best for you.

Fly from

District of Columbia

Fly to

Seattle

Route

Depart

Return

Price

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

dom. 1/11

5:55 pm-8:57 pm

Nonstop6h 02m

Seattle/Tacoma Intl

dom. 1/18

8:10 am-4:16 pm

Nonstop5h 06m

$216

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

mar. 2/3

8:59 am-5:29 pm

1 stop11h 30m

Seattle/Tacoma Intl

sáb. 2/28

7:10 am-9:02 pm

1 stop10h 52m

$218

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

lun. 2/2

5:55 pm-8:57 pm

Nonstop6h 02m

Seattle/Tacoma Intl

jue. 2/12

8:17 am-4:19 pm

Nonstop5h 02m

$218

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

mar. 1/13

9:59 am-5:52 pm

1 stop10h 53m

Seattle/Tacoma Intl

mié. 1/21

8:50 pm-5:56 pm

1 stop18h 06m

$218

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

mar. 1/13

6:56 pm-11:21 am

1 stop19h 25m

Seattle/Tacoma Intl

mar. 1/20

9:45 pm-4:01 pm

1 stop15h 16m

$218

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

sáb. 1/17

6:56 pm-8:18 am

1 stop16h 22m

Seattle/Tacoma Intl

mié. 1/21

7:15 am-9:00 pm

1 stop10h 45m

$218

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

jue. 1/8

6:56 pm-9:18 am

1 stop17h 22m

Seattle/Tacoma Intl

lun. 1/12

7:15 am-9:00 pm

1 stop10h 45m

$218

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

sáb. 1/17

6:56 pm-8:18 am

1 stop16h 22m

Seattle/Tacoma Intl

mar. 1/27

7:50 pm-4:01 pm

1 stop17h 11m

$218

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

lun. 1/26

6:56 pm-11:21 am

1 stop19h 25m

Seattle/Tacoma Intl

mié. 1/28

8:06 am-8:00 pm

1 stop8h 54m

$218

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

lun. 1/26

6:56 pm-11:21 am

1 stop19h 25m

Seattle/Tacoma Intl

jue. 1/29

8:06 am-8:00 pm

1 stop8h 54m

$218

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 43 results
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Best time to book a flight from District of Columbia to Seattle

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

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

Currently, March is the cheapest month in which you can book a flight from District of Columbia to Seattle (average of $104). Flying from District of Columbia to Seattle in July is currently the most expensive (average of $232). 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 DC to SEA?

Find hourly flight availability from District of Columbia to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 15, 2025.

A simple way to save on the total cost of your ticket is to fly from District of Columbia to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from District of Columbia to Seattle?

Use this chart to determine the cheapest time to fly round-trip from District of Columbia to Seattle. Price data was last updated on December 13, 2025.

Travelers seeking maximum savings on their District of Columbia to Seattle flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from District of Columbia to Seattle

Explore weekly flight availability from District of Columbia to Seattle. 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 diciembre 15, 2025.

The most flights from USDC to SEA are scheduled on a Monday (22 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost to fly round-trip from District of Columbia to Seattle?

Related info for your journey

Find useful and relevant information for your journey from District of Columbia to Seattle. 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 into for flights to Seattle from District of Columbia?

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

  • How long is the flight from District of Columbia to Seattle?

    Departing from District of Columbia to Seattle will take you 6h 02m. Airlines will cover a distance of 2299 mi. This flight may include one or multiple stops.

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

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $85. However, be on the lookout for offers from Frontier and Southwest, as they are both options that can get you from District of Columbia to Seattle for a low price.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from District of Columbia to Seattle on time: United Airlines (89%), Alaska Airlines (81%), China Eastern (80%).

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

    The cheapest flight price from District of Columbia to Seattle is $119. On average you can expect to pay $1,192. The most popular route, (Washington, D.C. Dulles Intl - Seattle/Tacoma Intl), can usually be booked for $199.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from District of Columbia to Seattle (average of $104). Flying from District of Columbia to Seattle in July is currently the most expensive (average of $232). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

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Alternative routes for District of Columbia to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from District of Columbia to Seattle

Discover the top 9 airlines that operate flights from District of Columbia to Seattle. 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 diciembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$111Average$266FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$125Average$278FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$149Average$444FlexibilityNo cancel feeOn-time85%
DeltaCheapest$179Average$363FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$197Average$454FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$228Average$418FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$236Average$480FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$264Average$476FlexibilityNo cancel feeOn-time75%
Sun Country AirCheapest$313Average$402FlexibilityNo cancel feeOn-time83%

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