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Dulles Intl

$92+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — IAD
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
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 December 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/4. 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.
Tue 12/3011:59 pmSEA - IAD
1 stop8h 46mUnited Airlines
Wed 1/75:55 pmIAD - SEA
Nonstop6h 02mUnited Airlines
Deal found 12/4$228
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Tue 12/3011:15 pmSEA - IAD
Nonstop4h 56mUnited Airlines
Tue 1/62:24 pmIAD - SEA
1 stop9h 51mUnited Airlines
Deal found 12/2$245
This Delta deal was found by Cheapflights users on 12/1. 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 12/263:30 pmSEA - IAD
Nonstop4h 57mDelta
Mon 1/197:30 amIAD - SEA
Nonstop5h 59mDelta
Deal found 12/1$268
This Delta deal was found by Cheapflights users on 12/1. 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 12/263:30 pmSEA - IAD
Nonstop4h 57mDelta
Tue 1/205:26 pmIAD - SEA
1 stop7h 23mDelta
Deal found 12/1$278
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 12/2411:15 pmSEA - IAD
Nonstop4h 56mUnited Airlines
Fri 1/95:55 pmIAD - SEA
Nonstop6h 02mUnited Airlines
Deal found 12/2$279
This Alaska Airlines deal was found by Cheapflights users on 12/1. 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 12/2510:00 amSEA - IAD
Nonstop5h 09mAlaska Airlines
Sat 1/246:04 pmIAD - SEA
Nonstop6h 04mAlaska Airlines
Deal found 12/1$283
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 12/318:00 amSEA - IAD
Nonstop5h 06mUnited Airlines
Wed 1/145:55 pmIAD - SEA
Nonstop6h 02mUnited Airlines
Deal found 12/2$284
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 12/2411:15 pmSEA - IAD
Nonstop4h 56mUnited Airlines
Thu 1/85:17 pmIAD - SEA
1 stop8h 26mUnited Airlines
Deal found 12/2$285
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Wed 12/315:54 pmSEA - IAD
1 stop10h 26mUnited Airlines
Wed 1/75:55 pmIAD - SEA
Nonstop6h 02mUnited Airlines
Deal found 12/3$307
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Wed 12/317:12 pmSEA - IAD
1 stop9h 08mUnited Airlines
Fri 1/95:17 pmIAD - SEA
1 stop8h 26mUnited Airlines
Deal found 12/3$313
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 12/317:45 pmPDX - IAD
1 stop8h 02mUnited Airlines
Mon 1/122:24 pmIAD - PDX
1 stop9h 48mUnited Airlines
Deal found 12/2$317
This Southwest deal was found by Cheapflights users on 12/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:05 amPDX - IAD
1 stop6h 40mSouthwest
Wed 1/74:30 pmIAD - PDX
1 stop9h 00mSouthwest
Deal found 12/1$331

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 December 4, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$207
(Kiwi.com)

One-way from

$92
(American Airlines)

Popular in

November

Cheapest in

August

Average price

$480

Good round-trip deal

$341 or less

Good one-way deal

$223 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. 11% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 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 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 December 4, 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

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Thu 1/22

7:49 pm-4:26 pm

1 stop17h 37m

Washington, D.C. Dulles Intl

Sat 1/31

6:04 pm-11:04 pm

1 stop8h 00m

$207

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Mon 3/2

12:45 pm-12:24 am

1 stop8h 39m

Washington, D.C. Dulles Intl

Tue 3/3

7:00 am-1:08 pm

1 stop9h 08m

$217

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Wed 1/7

1:20 pm-11:10 pm

1 stop6h 50m

Washington, D.C. Dulles Intl

Mon 1/12

2:20 pm-7:54 pm

1 stop8h 34m

$217

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Fri 2/6

9:05 am-4:26 pm

1 stop28h 21m

Washington, D.C. Dulles Intl

Mon 2/9

6:04 pm-11:12 am

1 stop20h 08m

$226

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Fri 2/6

11:25 am-11:10 pm

1 stop8h 45m

Washington, D.C. Dulles Intl

Sun 2/8

7:30 am-12:37 pm

1 stop8h 07m

$227

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Thu 1/8

1:20 pm-11:10 pm

1 stop6h 50m

Washington, D.C. Dulles Intl

Mon 1/12

7:30 am-12:08 am

1 stop19h 38m

$227

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Fri 2/6

11:25 am-11:10 pm

1 stop8h 45m

Washington, D.C. Dulles Intl

Mon 2/9

7:30 am-2:55 pm

1 stop10h 25m

$227

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Thu 1/15

1:20 pm-11:10 pm

1 stop6h 50m

Washington, D.C. Dulles Intl

Sun 1/18

7:30 am-12:37 pm

1 stop8h 07m

$227

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 3/4

8:17 am-4:19 pm

Nonstop5h 02m

Washington, D.C. Dulles Intl

Mon 3/9

5:26 pm-10:45 pm

1 stop8h 19m

$228

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 3/11

3:55 pm-11:48 pm

Nonstop4h 53m

Washington, D.C. Dulles Intl

Sat 3/14

7:00 am-10:01 am

Nonstop6h 01m

$228

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

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 December 4, 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 32% 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 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 December 4, 2025.

The most flights from USWA to IAD are scheduled on a Thursday (21 on average). You will have fewer flight options on Monday, 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 8h 39m. Airlines will cover a distance of 2076 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: Copa Airlines (100%), Avianca (97%), United Airlines( 96%).

  • 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 $1,065, our data shows the cheapest flight currently is $155. When looking at the most popular route, (Seattle/Tacoma Intl - Washington, D.C. Dulles Intl), you can expect to pay $158 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
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Fairfax
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Bowie
Largo
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.
Dallas/Fort Worth to Baltimore flights
Los Angeles to Reagan-National flights
Dallas/Fort Worth to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Los Angeles to Baltimore flights
Boston to Baltimore flights
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Boston to Dulles Intl flights
Atlanta to Baltimore flights
San Francisco to Dulles Intl flights
Atlanta to Reagan-National flights
O'Hare Intl to Baltimore flights
Boston to Reagan-National flights
San Francisco to Reagan-National flights
Atlanta to Dulles Intl flights
Hobby to Baltimore flights
Seattle to Dulles Intl flights
Hobby to Dulles Intl flights
O'Hare Intl to Dulles Intl flights
O'Hare Intl to Reagan-National flights
Tampa to Dulles Intl flights
San Francisco to Baltimore flights
Orlando to Dulles Intl flights
Orlando to Reagan-National flights
Minneapolis to Dulles Intl flights
LaGuardia to Reagan-National flights
Hobby to Reagan-National flights
Seattle to Reagan-National flights
Denver to Baltimore flights
Fort Lauderdale to Baltimore flights
Denver to Dulles Intl flights
John F Kennedy Intl to Reagan-National flights
Austin to Dulles Intl flights
Fort Lauderdale to Dulles Intl flights
George Bush Intcntl to Baltimore flights
John F Kennedy Intl to Dulles Intl flights
Miami to Baltimore flights
Charlotte to Baltimore flights
Tampa to Reagan-National flights
Orlando to Baltimore flights
Minneapolis to Baltimore flights
George Bush Intcntl to Dulles Intl flights
Charlotte to Dulles Intl flights
Miami to Dulles Intl flights
Detroit to Baltimore flights
Miami to Reagan-National flights
Detroit to Dulles Intl flights
Minneapolis to Reagan-National flights
San Diego to Dulles Intl flights
Fort Lauderdale 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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$143Average$332FlexibilityNo cancel feeOn-time85%
DeltaCheapest$149Average$410FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$188Average$300FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$258Average$493FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$277Average$514FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$336Average$708FlexibilityNo cancel feeOn-time71%

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