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Dulles Intl

$135+ 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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — IAD
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Find 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 October 16, 2025.

This Alaska Airlines deal was found by Cheapflights users on 10/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/810:29 pmSEA - IAD
Nonstop4h 54mAlaska Airlines
Thu 11/277:38 amIAD - SEA
Nonstop5h 54mAlaska Airlines
Deal found 10/15$248
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Fri 11/77:13 pmSEA - IAD
1 stop7h 03mUnited Airlines
Sun 11/95:55 pmIAD - SEA
Nonstop5h 59mUnited Airlines
Deal found 10/16$249
This Delta deal was found by Cheapflights users on 10/16. 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.
Sat 11/811:15 amSEA - IAD
1 stop9h 18mDelta
Fri 11/147:15 amIAD - SEA
Nonstop6h 04mDelta
Deal found 10/16$251
This Delta deal was found by Cheapflights users on 10/16. 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.
Fri 11/74:48 pmSEA - IAD
Nonstop4h 52mDelta
Tue 11/117:15 amIAD - SEA
Nonstop6h 04mDelta
Deal found 10/16$257
This Delta deal was found by Cheapflights users on 10/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/51:30 pmSEA - IAD
1 stop7h 03mDelta
Fri 11/217:15 amIAD - SEA
Nonstop6h 04mDelta
Deal found 10/15$258
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Sat 11/88:36 amSEA - IAD
1 stop7h 16mUnited Airlines
Fri 11/146:00 amIAD - SEA
1 stop9h 47mUnited Airlines
Deal found 10/16$259
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Mon 11/108:00 amSEA - IAD
Nonstop5h 07mUnited Airlines
Mon 11/175:55 pmIAD - SEA
Nonstop5h 59mUnited Airlines
Deal found 10/16$261
This Alaska Airlines deal was found by Cheapflights users on 10/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/58:44 amSEA - IAD
Nonstop4h 56mAlaska Airlines
Tue 11/187:43 amIAD - SEA
Nonstop5h 52mAlaska Airlines
Deal found 10/15$264
This Cheapflightsfares deal was found by Cheapflights users on 10/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:11 pmSEA - IAD
Nonstop4h 55mAlaska Airlines
Mon 12/85:37 pmIAD - SEA
1 stop9h 35mAlaska Airlines
Deal found 10/15$266
This United Airlines deal was found by Cheapflights users on 10/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/68:00 amSEA - IAD
Nonstop5h 07mUnited Airlines
Mon 11/106:39 pmIAD - SEA
1 stop9h 20mUnited Airlines
Deal found 10/15$267
This American Airlines deal was found by Cheapflights users on 10/16. 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.
Wed 11/125:24 amSEA - IAD
1 stop7h 47mAmerican Airlines
Mon 11/242:16 pmIAD - SEA
1 stop9h 23mAmerican Airlines
Deal found 10/16$268
This Alaska Airlines deal was found by Cheapflights users on 10/16. 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.
Thu 11/1310:29 pmSEA - IAD
Nonstop4h 54mAlaska Airlines
Mon 11/175:40 pmIAD - SEA
1 stop22h 04mAlaska Airlines
Deal found 10/16$269

Cheap 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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$248
(Alaska Airlines)

One-way from

$135
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$398

Good round-trip deal

$324 or less

Good one-way deal

$190 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. 12% potential increase in price ($59 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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.
Search Deals

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 October 16, 2025.
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

Wed 11/12

10:29 pm-6:23 am

Nonstop4h 54m

Washington, D.C. Dulles Intl

Mon 11/24

7:38 am-10:32 am

Nonstop5h 54m

$248

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Tue 11/11

10:29 pm-6:23 am

Nonstop4h 54m

Washington, D.C. Dulles Intl

Wed 11/26

6:34 pm-9:30 pm

Nonstop5h 56m

$248

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Fri 11/7

4:48 pm-12:40 am

Nonstop4h 52m

Washington, D.C. Dulles Intl

Thu 11/13

7:01 am-2:37 pm

1 stop10h 36m

$249

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Fri 1/30

9:25 am-8:54 pm

1 stop8h 29m

Washington, D.C. Dulles Intl

Sun 2/1

5:55 pm-8:57 pm

Nonstop6h 02m

$249

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 11/8

4:48 pm-12:40 am

Nonstop4h 52m

Washington, D.C. Dulles Intl

Tue 11/11

7:10 am-2:59 pm

1 stop10h 49m

$249

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Fri 11/7

4:48 pm-12:40 am

Nonstop4h 52m

Washington, D.C. Dulles Intl

Mon 11/17

11:05 am-6:40 pm

1 stop10h 35m

$249

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sun 11/9

4:59 pm-12:54 am

Nonstop4h 55m

Washington, D.C. Dulles Intl

Wed 11/19

5:59 pm-11:59 pm

1 stop9h 00m

$249

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 11/8

1:30 pm-11:33 pm

1 stop7h 03m

Washington, D.C. Dulles Intl

Sun 11/16

7:15 am-10:19 am

Nonstop6h 04m

$249

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Tue 11/11

1:44 pm-11:58 pm

1 stop7h 14m

Washington, D.C. Dulles Intl

Sun 11/16

7:15 am-10:19 am

Nonstop6h 04m

$249

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Thu 12/4

1:45 pm-12:02 am

1 stop7h 17m

Washington, D.C. Dulles Intl

Tue 12/9

7:15 am-10:12 am

Nonstop5h 57m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

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 $295). 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 October 16, 2025.

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 31% on your trip compared to booking a flight at noon.

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 December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Washington, D.C. Dulles Intl Airport flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Thursday mornings 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 October 16, 2025.

The most flights from USWA to IAD are scheduled on a Thursday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 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 52m. 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: STARLUX Airlines (100%), Avianca (98%), Lufthansa( 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 $925, our data shows the cheapest flight currently is $148. When looking at the most popular route, (Seattle/Tacoma Intl - Washington, D.C. Dulles Intl), you can expect to pay $233 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 $295). 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
Arlington
Tysons
Springfield
Silver Spring
Hanover
Gaithersburg
Fredericksburg
Fairfax
Linthicum Heights
Falls Church
Owings Mills
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf

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.
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O'Hare Intl to Baltimore flights
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Los Angeles to Baltimore flights
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Tampa to Baltimore flights
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Miami to Reagan-National flights
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Miami to Dulles Intl flights
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Fort Lauderdale to Baltimore flights
Orlando to Baltimore flights
John F Kennedy Intl to Reagan-National flights
Tampa to Reagan-National flights
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George Bush Intcntl to Baltimore flights
LaGuardia to Reagan-National flights

Top 6 airlines flying from Washington to Dulles Intl

Discover the top 6 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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$143Average$332FlexibilityNo cancel feeOn-time85%
FrontierCheapest$188Average$298FlexibilityNo cancel feeOn-time62%
DeltaCheapest$192Average$421FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$256Average$626FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$257Average$453FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$277Average$461FlexibilityNo cancel feeOn-time75%

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