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$166+ Cheap flights from Dulles Intl (IAD) to Washington

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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SEA
Sep 2 — Sep 91
Wed 9/2
Wed 9/9
1 adult, Economy
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Cheap flight deals from Dulles Intl to Washington

Cheapest flights from Dulles Intl to Washington
Explore the most affordable flight options available from Dulles Intl to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 3, 2026.

This Kiwi.com deal was found by Cheapflights users on 8/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:59 am
IAD
-
SEA
1 stop28h 40m
Frontier
Wed 9/97:25 pm
SEA
-
IAD
2 stops13h 08m
Frontier
Deal found 8/3$283
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:59 am
IAD
-
SEA
1 stop28h 40m
Frontier
Tue 9/88:48 pm
SEA
-
IAD
2 stops24h 22m
Frontier
Deal found 8/2$284
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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.
Mon 8/249:03 am
IAD
-
SEA
Nonstop5h 36m
Alaska Airlines
Tue 9/18:38 am
SEA
-
IAD
Nonstop5h 06m
Alaska Airlines
Deal found 7/30$285
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Mon 8/248:59 am
IAD
-
SEA
1 stop28h 40m
Frontier
Thu 9/34:33 pm
SEA
-
IAD
1 stop12h 31m
Frontier
Deal found 7/30$286
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Sat 8/228:59 am
IAD
-
SEA
2 stops13h 39m
Frontier
Wed 8/268:53 pm
SEA
-
IAD
1 stop8h 11m
Frontier
Deal found 7/30$287
This CheapOair deal was found by Cheapflights users on 7/30. 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.
Sat 9/58:59 am
IAD
-
SEA
1 stop28h 40m
Frontier
Mon 9/79:36 pm
SEA
-
IAD
1 stop28h 25m
Frontier
Deal found 7/30$288
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Mon 8/248:59 am
IAD
-
SEA
1 stop28h 40m
Frontier
Wed 8/267:06 pm
SEA
-
IAD
2 stops18h 01m
Frontier
Deal found 7/31$289
This Alaska Airlines deal was found by Cheapflights users on 8/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/299:03 am
IAD
-
SEA
Nonstop5h 36m
Alaska Airlines
Thu 9/33:56 pm
SEA
-
IAD
Nonstop5h 03m
Alaska Airlines
Deal found 8/2$290
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Sat 8/228:59 am
IAD
-
SEA
2 stops13h 39m
Frontier
Tue 8/258:53 pm
SEA
-
IAD
1 stop8h 11m
Frontier
Deal found 7/30$291
This Alaska Airlines deal was found by Cheapflights users on 8/1. 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.
Fri 8/287:00 am
IAD
-
SEA
Nonstop5h 37m
Alaska Airlines
Sat 9/53:56 pm
SEA
-
IAD
Nonstop5h 03m
Alaska Airlines
Deal found 8/1$292
This Alaska Airlines deal was found by Cheapflights users on 8/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:00 am
IAD
-
SEA
Nonstop5h 37m
Alaska Airlines
Sat 8/299:35 pm
SEA
-
IAD
Nonstop5h 05m
Alaska Airlines
Deal found 8/3$293
This Alaska Airlines deal was found by Cheapflights users on 8/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:00 am
IAD
-
SEA
Nonstop5h 37m
Alaska Airlines
Mon 8/319:35 pm
SEA
-
IAD
Nonstop5h 05m
Alaska Airlines
Deal found 8/3$294

Find flight deals from Dulles Intl to Washington

Keep the following information in mind while searching for Dulles Intl to Washington flight deals. Data was last updated August 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$283
(Kiwi.com)

One-way from

$166
(Super.com)

Popular in

July

Cheapest in

February

Average price

$437

Good round-trip deal

$377 or less

Good one-way deal

$245 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 Washington, D.C. Dulles Intl to Washington
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Washington
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($93 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 August 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Washington.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Washington.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Washington 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 August 3, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Fri 9/25

7:00 am-9:37 am

Nonstop5h 37m

Seattle/Tacoma Intl

Mon 9/28

9:35 pm-5:40 am

Nonstop5h 05m

$285

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 9/2

5:15 pm-10:43 pm

1 stop8h 28m

Seattle/Tacoma Intl

Wed 9/9

11:04 pm-7:09 am

Nonstop5h 05m

$295

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sun 9/20

7:00 am-9:37 am

Nonstop5h 37m

Seattle/Tacoma Intl

Sat 9/26

8:30 am-4:43 pm

Nonstop5h 13m

$321

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 10/1

1:05 pm-3:51 pm

Nonstop5h 46m

Seattle/Tacoma Intl

Sun 10/4

8:25 am-4:31 pm

Nonstop5h 06m

$347

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 8/26

2:47 pm-8:43 pm

1 stop8h 56m

Seattle/Tacoma Intl

Sun 8/30

11:04 pm-7:07 am

Nonstop5h 03m

$347

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Fri 8/28

6:00 pm-8:45 pm

Nonstop5h 45m

Seattle/Tacoma Intl

Mon 8/31

11:00 pm-9:28 am

1 stop7h 28m

$347

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Tue 8/25

7:10 am-12:08 pm

1 stop7h 58m

Spokane

Sat 8/29

12:36 pm-12:34 am

1 stop8h 58m

$351

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Sat 8/29

7:00 am-12:12 pm

1 stop8h 12m

Spokane

Sat 9/5

2:05 pm-11:21 pm

1 stop6h 16m

$351

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 9/17

7:47 pm-9:20 am

1 stop16h 33m

Seattle/Tacoma Intl

Sun 9/20

3:56 pm-11:59 pm

Nonstop5h 03m

$359

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Sun 8/30

6:00 am-11:21 am

1 stop8h 21m

Spokane

Wed 9/2

1:00 pm-11:59 pm

1 stop7h 59m

$360

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Dulles Intl to Washington

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

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to State of Washington (average of $237). Flying from Washington, D.C. Dulles Intl Airport to State of Washington in June is currently the most expensive (average of $536). 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 IAD to WA?

Find hourly flight availability from Dulles Intl to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 3, 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 23% on flights from Washington, D.C. Dulles Intl Airport to State of Washington by exploring options for tickets in the morning.

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

Explore weekly flight availability from Dulles Intl to Washington. 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 August 3, 2026.

The most flights from IAD to USWA are scheduled on a Sunday (27 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (15 on average).

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to State of Washington?

Airfare is below average for this route at the moment.
Washington, D.C. Dulles Intl Airport to State of Washington flights typically cost between $357 and $576 in September.
The cheapest round-trip price found within the last 5 days was $283 on Frontier (Sep 2-Sep 9).

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to State of Washington?

The best time to book flights from Washington, D.C. Dulles Intl Airport to State of Washington is 20 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Washington. Price data was last updated on August 1, 2026.

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

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated August 3, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Washington, such as Alaska Airlines,Delta, andHawaiian Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,761 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.0

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
Alaska Airlines
7.9
Good
12,761 reviews
Alaska Airlines
7.9
Good
12,761 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.0

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
Delta
7.8
Good
8,483 reviews
Alaska Airlines
7.9
Good
12,761 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.0

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
Hawaiian Airlines
7.8
Good
2,819 reviews
Alaska Airlines
7.9
Good
12,761 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.0

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
United Airlines
7.4
Good
10,060 reviews
Alaska Airlines
7.9
Good
12,761 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.0

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
American Airlines
7.1
Good
11,845 reviews
Alaska Airlines
7.9
Good
12,761 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.0

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Washington. 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 Washington, D.C. Dulles Intl Airport to State of Washington?

    A quick flight from Washington, D.C. Dulles Intl Airport to State of Washington can take about 5h 37m. Alaska Airlines provides one of the quickest options available for as low as $285. Airlines will cover a distance of 2299 mi. This flight may include one or multiple stops.

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

    When deciding which route to take from Washington, D.C. Dulles Intl Airport to State of Washington consider Washington, D.C. Dulles Intl - Seattle/Tacoma Intl, Washington, D.C. Dulles Intl - Portland or Washington, D.C. Dulles Intl - Spokane as they are the most popular.

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

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to State of Washington are Finnair (96%), Japan Airlines (90%) and Alaska Airlines (88%).

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

    On average you can expect to pay $1,262 for a flight from Washington, D.C. Dulles Intl Airport to State of Washington. The cheapest flight overall is $163 while the most popular route, (Washington, D.C. Dulles Intl - Seattle/Tacoma Intl) is currently priced at $285.

  • Can I find deals for flights from Dulles Intl to Washington that include hotel bookings?

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to State of Washington (average of $237). Flying from Washington, D.C. Dulles Intl Airport to State of Washington in June is currently the most expensive (average of $536). 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 Dulles Intl to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Reagan-National to Hobby flights
Reagan-National to San Francisco flights
Baltimore to Midway flights
Dulles Intl to Tampa flights
Baltimore to Atlanta flights
Dulles Intl to New Orleans flights
Dulles Intl to Hobby flights
Dulles Intl to Nashville flights
Dulles Intl to San Diego flights
Reagan-National to Fort Lauderdale flights
Reagan-National to Nashville flights
Dulles Intl to George Bush Intcntl flights
Dulles Intl to Austin flights
Reagan-National to Denver flights

Top 6 airlines flying from Dulles Intl to Washington

Discover the top 6 airlines that operate flights from Dulles Intl to Washington. 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 August 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$138Average$322FlexibilityNo cancel feeOn-time85%
DeltaCheapest$145Average$393FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$191Average$378FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$199Average$491FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$234Average$465FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$337Average$556FlexibilityNo cancel feeOn-time71%

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