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Dulles Intl

$123+ Cheap flights from Washington to Dulles Intl (IAD)

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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — IAD
févr. 28 — mars 71
sam. 2/28
sam. 3/7
1 adult, Economy
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Cheap flight deals from Washington to Dulles Intl

Cheapest flights from Washington to Dulles Intl
Explore the most affordable flight options available from Washington to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janvier 29, 2026.

This United Airlines deal was found by Cheapflights users on 1/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 2/268:17 am
SEA
-
IAD
Nonstop5h 02m
United Airlines
jeu. 3/55:55 pm
IAD
-
SEA
Nonstop6h 01m
United Airlines
Deal found 1/28$237
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
sam. 2/219:27 am
SEA
-
IAD
Nonstop4h 53m
Hawaiian Airlines
sam. 2/287:05 am
IAD
-
SEA
Nonstop6h 00m
Hawaiian Airlines
Deal found 1/27$246
This United Airlines deal was found by Cheapflights users on 1/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 3/2812:25 pm
SEA
-
IAD
1 stop7h 54m
United Airlines
ven. 4/35:55 pm
IAD
-
SEA
Nonstop5h 58m
United Airlines
Deal found 1/28$247
This United Airlines deal was found by Cheapflights users on 1/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 2/2812:42 pm
SEA
-
IAD
1 stop7h 39m
United Airlines
ven. 3/65:26 pm
IAD
-
SEA
1 stop8h 19m
United Airlines
Deal found 1/28$252
This United Airlines deal was found by Cheapflights users on 1/27. 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.
lun. 2/2312:43 pm
SEA
-
IAD
1 stop7h 38m
United Airlines
mar. 3/31:02 pm
IAD
-
SEA
1 stop9h 01m
United Airlines
Deal found 1/27$253
This Trip.com deal was found by Cheapflights users on 1/26. 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.
mar. 3/179:27 am
SEA
-
IAD
Nonstop4h 53m
Hawaiian Airlines
mar. 3/247:11 pm
IAD
-
SEA
Nonstop5h 51m
Hawaiian Airlines
Deal found 1/26$256
This Delta deal was found by Cheapflights users on 1/28. 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.
mer. 2/1811:22 am
GEG
-
IAD
1 stop8h 48m
Delta
mer. 2/257:30 am
IAD
-
GEG
1 stop10h 28m
Delta
Deal found 1/28$257
This CheapOair deal was found by Cheapflights users on 1/27. 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.
sam. 2/219:27 am
SEA
-
IAD
Nonstop4h 53m
Alaska Airlines
sam. 2/287:05 am
IAD
-
SEA
Nonstop6h 00m
Alaska Airlines
Deal found 1/27$257
This United Airlines deal was found by Cheapflights users on 1/27. 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.
mar. 3/311:39 pm
PSC
-
IAD
1 stop8h 46m
United Airlines
mar. 4/76:30 am
IAD
-
PSC
1 stop9h 00m
United Airlines
Deal found 1/27$257
This American Airlines deal was found by Cheapflights users on 1/26. 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.
mar. 3/175:30 am
SEA
-
IAD
1 stop8h 01m
American Airlines
mar. 3/245:00 am
IAD
-
SEA
1 stop9h 27m
American Airlines
Deal found 1/26$259
This United Airlines deal was found by Cheapflights users on 1/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 2/277:33 pm
SEA
-
IAD
1 stop8h 58m
United Airlines
ven. 3/65:55 pm
IAD
-
SEA
Nonstop6h 01m
United Airlines
Deal found 1/28$261
This Delta deal was found by Cheapflights users on 1/27. 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.
mer. 3/183:55 pm
SEA
-
IAD
Nonstop4h 54m
Delta
sam. 3/217:00 am
IAD
-
SEA
Nonstop6h 03m
Delta
Deal found 1/27$262

Find flight deals from Washington to Dulles Intl

Keep the following information in mind while searching for Washington to Dulles Intl flight deals. Data was last updated janvier 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$237
(United Airlines)

One-way from

$123
(Kiwi.com)

Popular in

June

Cheapest in

July

Average price

$388

Good round-trip deal

$291 or less

Good one-way deal

$181 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Washington, D.C. (WAS) flights.
Search Deals
From Washington to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Washington to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($6 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Washington to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Washington to Washington, D.C. Dulles Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Dulles Intl 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 janvier 29, 2026.
Use the filters below to find and compare flights from Washington to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Washington

Fly to

Dulles Intl

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

jeu. 3/12

3:55 pm-11:48 pm

Nonstop4h 53m

Washington, D.C. Dulles Intl

dim. 3/15

7:00 am-10:03 am

Nonstop6h 03m

$237

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

mer. 4/29

9:41 pm-5:50 am

Nonstop5h 09m

Washington, D.C. Dulles Intl

dim. 5/3

9:00 am-11:47 am

Nonstop5h 47m

$237

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

ven. 4/17

3:59 pm-11:55 pm

Nonstop4h 56m

Washington, D.C. Dulles Intl

mar. 4/28

7:00 am-9:54 am

Nonstop5h 54m

$237

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

ven. 2/27

3:20 pm-11:10 pm

Nonstop4h 50m

Washington, D.C. Dulles Intl

ven. 3/6

7:30 am-10:29 am

Nonstop5h 59m

$237

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

jeu. 2/19

3:20 pm-11:10 pm

Nonstop4h 50m

Washington, D.C. Dulles Intl

dim. 2/22

7:30 am-10:29 am

Nonstop5h 59m

$237

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

jeu. 2/26

12:43 pm-11:21 pm

1 stop7h 38m

Washington, D.C. Dulles Intl

jeu. 3/5

5:55 pm-8:56 pm

Nonstop6h 01m

$243

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

sam. 2/28

8:17 am-4:19 pm

Nonstop5h 02m

Washington, D.C. Dulles Intl

ven. 3/6

5:26 pm-10:45 pm

1 stop8h 19m

$247

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

jeu. 4/16

12:08 pm-11:25 pm

1 stop8h 17m

Washington, D.C. Dulles Intl

lun. 4/27

5:55 pm-8:53 pm

Nonstop5h 58m

$247

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

mer. 2/18

12:43 pm-11:21 pm

1 stop7h 38m

Washington, D.C. Dulles Intl

mer. 2/25

1:02 pm-7:03 pm

1 stop9h 01m

$253

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

mar. 2/24

12:43 pm-11:21 pm

1 stop7h 38m

Washington, D.C. Dulles Intl

mar. 3/3

2:36 pm-9:01 pm

1 stop9h 25m

$253

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 60 results
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Best time to book a flight from Washington to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Washington 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 Washington to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from State of Washington to Washington, D.C. Dulles Intl Airport?

Currently, March is the cheapest month in which you can book a flight from State of Washington to Washington, D.C. Dulles Intl Airport (average of $143). Flying from State of Washington to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $292). 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 WA to IAD?

Find hourly flight availability from Washington to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated janvier 29, 2026.

A simple way to save on the total cost of your ticket is to fly from State of Washington to Washington, D.C. Dulles Intl Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 37% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from State of Washington to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Washington to Dulles Intl. Price data was last updated on January 24, 2026.

Travelers seeking maximum savings on their State of Washington to Washington, D.C. Dulles Intl Airport flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from State of Washington to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Washington to Dulles Intl. 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 janvier 29, 2026.

The most flights from USWA to IAD are scheduled on a Monday (14 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).

Related info for your journey

Find useful and relevant information for your journey from Washington to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from State of Washington to Washington, D.C. Dulles Intl Airport?

    Departing from State of Washington to Washington, D.C. Dulles Intl Airport will take you 4h 53m. Airlines will cover a distance of 2299 mi. This flight may include one or multiple stops.

  • What are the most popular routes from State of Washington to Washington, D.C. Dulles Intl Airport?

    Most travelers choose Seattle/Tacoma Intl - Washington, D.C. Dulles Intl, Portland - Washington, D.C. Dulles Intl or Spokane - Washington, D.C. Dulles Intl when deciding on the best route from State of Washington to Washington, D.C. Dulles Intl Airport.

  • What are the most reliable airlines from State of Washington to Washington, D.C. Dulles Intl Airport?

    Before booking your flight to Washington, D.C. Dulles Intl Airport from State of Washington, check out the most reliable airlines to get you to your destination on time: Austrian Airlines (100%), Brussels Airlines (100%), Avianca( 98%).

  • What are the cheapest flights from State of Washington to Washington, D.C. Dulles Intl Airport?

    While on average a flight from State of Washington to Washington, D.C. Dulles Intl Airport is generally $688, our data shows the cheapest flight currently is $119. 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 Washington to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Washington to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Dulles Intl.

  • Can I find deals for business class flights from Washington to Dulles Intl?

    Yes. Cheapflights offers flight deals from Washington to Dulles Intl 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 State of Washington to Washington, D.C. Dulles Intl Airport?

    Currently, March is the cheapest month in which you can book a flight from State of Washington to Washington, D.C. Dulles Intl Airport (average of $143). Flying from State of Washington to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $292). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Manassas
Largo
Bowie
McLean
Clinton
Upper Marlboro

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Reagan-National flights
Dallas/Fort Worth to Dulles Intl flights
Los Angeles to Baltimore flights
Los Angeles to Dulles Intl flights
O'Hare Intl to Reagan-National flights
Boston to Baltimore flights
Dallas/Fort Worth to Baltimore flights
O'Hare Intl to Baltimore flights
Dallas/Fort Worth to Reagan-National flights
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San Francisco to Reagan-National flights
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Boston to Reagan-National flights
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Atlanta to Baltimore flights
Seattle to Reagan-National flights
Miami to Dulles Intl flights
Atlanta to Dulles Intl flights
Hobby to Reagan-National flights
Hobby to Dulles Intl flights
San Francisco to Dulles Intl flights
Atlanta to Reagan-National flights
George Bush Intcntl to Reagan-National flights
San Francisco to Baltimore flights
Orlando to Reagan-National flights
Seattle to Dulles Intl flights
Fort Lauderdale to Dulles Intl flights
Denver to Baltimore flights
Detroit to Dulles Intl flights
Hobby to Baltimore flights
Orlando to Baltimore flights
Miami to Baltimore flights
Charlotte to Dulles Intl flights
Tampa to Dulles Intl flights
Austin to Dulles Intl flights
George Bush Intcntl to Dulles Intl flights
Denver to Dulles Intl flights
Seattle to Baltimore flights
Midway to Dulles Intl flights
Denver to Reagan-National flights
Fort Lauderdale to Baltimore flights
Minneapolis to Reagan-National flights
Detroit to Baltimore flights
Sky Harbor Intl to Dulles Intl flights
Austin to Reagan-National flights
Charlotte to Baltimore flights
LaGuardia to Reagan-National flights
Austin to Baltimore flights
Tampa to Reagan-National flights
Minneapolis to Baltimore flights

Top 7 airlines flying from Washington to Dulles Intl

Discover the top 7 airlines that operate flights from Washington to Dulles Intl. 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 janvier 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$126Average$300FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$138Average$317FlexibilityNo cancel feeOn-time85%
DeltaCheapest$149Average$387FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$226Average$469FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$247Average$507FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$296Average$451FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$336Average$708FlexibilityNo cancel feeOn-time71%

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