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$139+ 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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SEA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap 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 October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$234
(SmartFares)

One-way from

$139
(Delta)

Popular in

December

Cheapest in

September

Average price

$397

Good round-trip deal

$341 or less

Good one-way deal

$229 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Seattle/Tacoma Intl flights.
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From Washington, D.C. Dulles Intl to Washington
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One-way flight from Washington, D.C. Dulles Intl to Washington
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Highest demand for flights based on searches. 3% potential increase in price ($15 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Washington.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Washington.
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Find 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 October 30, 2025.

This SmartFares deal was found by Cheapflights users on 10/29. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:38 amIAD - SEA
Nonstop5h 54mHawaiian Airlines
Thu 12/410:11 pmSEA - IAD
Nonstop4h 55mHawaiian Airlines
Deal found 10/29$234
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:34 amIAD - SEA
Nonstop6h 01mAlaska Airlines
Sun 12/710:11 pmSEA - IAD
Nonstop4h 55mAlaska Airlines
Deal found 10/28$235
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:30 pmIAD - SEA
Nonstop6h 00mAlaska Airlines
Mon 12/810:11 pmSEA - IAD
Nonstop4h 55mAlaska Airlines
Deal found 10/28$237
This Delta deal was found by Cheapflights users on 10/29. 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.
Thu 11/277:15 amIAD - SEA
Nonstop6h 04mDelta
Wed 12/33:30 pmSEA - IAD
Nonstop4h 57mDelta
Deal found 10/29$238
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/125:55 pmIAD - SEA
Nonstop5h 59mUnited Airlines
Mon 12/157:34 pmSEA - IAD
1 stop8h 56mUnited Airlines
Deal found 10/29$247
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/125:37 pmIAD - SEA
1 stop9h 35mAlaska Airlines
Mon 12/157:59 pmSEA - IAD
1 stop18h 31mAlaska Airlines
Deal found 10/28$256
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Wed 12/35:15 pmIAD - SEA
1 stop8h 13mUnited Airlines
Thu 12/119:05 amSEA - IAD
1 stop8h 34mUnited Airlines
Deal found 10/28$257
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/82:16 pmIAD - SEA
1 stop9h 21mAmerican Airlines
Tue 12/1612:41 pmSEA - IAD
1 stop7h 27mAmerican Airlines
Deal found 10/28$258
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:00 amIAD - SEA
1 stop10h 01mAmerican Airlines
Sun 12/75:18 amSEA - IAD
1 stop7h 50mAmerican Airlines
Deal found 10/28$259
This United Airlines deal was found by Cheapflights users on 10/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:55 pmIAD - SEA
Nonstop5h 59mUnited Airlines
Sat 12/138:10 amSEA - IAD
Nonstop5h 08mUnited Airlines
Deal found 10/30$260
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:34 amIAD - SEA
Nonstop6h 01mAlaska Airlines
Sun 12/710:11 pmSEA - IAD
Nonstop4h 55mAlaska Airlines
Deal found 10/28$262
This Delta deal was found by Cheapflights users on 10/29. 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 12/35:03 pmIAD - PDX
1 stop8h 07mDelta
Tue 12/912:32 amPDX - IAD
1 stop7h 46mDelta
Deal found 10/29$297

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 October 30, 2025.
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

Dulles Intl

Fly to

Washington

Route

Depart

Return

Price

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 1/14

7:30 am-10:29 am

Nonstop5h 59m

Seattle/Tacoma Intl

Sun 1/18

3:20 pm-11:10 pm

Nonstop4h 50m

$238

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Fri 12/12

5:55 pm-8:54 pm

Nonstop5h 59m

Seattle/Tacoma Intl

Sun 12/14

10:40 am-9:18 pm

1 stop7h 38m

$247

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 12/10

5:37 pm-12:12 am

1 stop9h 35m

Seattle/Tacoma Intl

Mon 12/15

7:59 pm-5:30 pm

1 stop18h 31m

$256

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 1/8

5:26 pm-9:28 am

1 stop19h 02m

Seattle/Tacoma Intl

Sun 1/11

8:21 pm-5:04 pm

1 stop17h 43m

$256

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 12/11

5:55 pm-8:54 pm

Nonstop5h 59m

Seattle/Tacoma Intl

Mon 12/15

7:34 pm-7:30 am

1 stop8h 56m

$267

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Tue 12/30

8:26 am-11:27 am

Nonstop6h 01m

Seattle/Tacoma Intl

Fri 1/9

8:10 am-4:16 pm

Nonstop5h 06m

$283

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 1/7

6:04 pm-9:08 pm

Nonstop6h 04m

Seattle/Tacoma Intl

Mon 1/12

8:30 am-4:26 pm

Nonstop4h 56m

$289

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 11/19

6:13 pm-9:12 pm

Nonstop5h 59m

Seattle/Tacoma Intl

Wed 12/3

7:59 pm-5:30 pm

1 stop18h 31m

$292

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 11/27

7:38 am-10:32 am

Nonstop5h 54m

Seattle/Tacoma Intl

Wed 12/3

7:59 pm-5:30 pm

1 stop18h 31m

$292

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Thu 12/4

7:34 am-12:39 pm

1 stop8h 05m

Spokane

Tue 12/9

5:51 am-4:36 pm

1 stop7h 45m

$304

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 60 results
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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, April is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to State of Washington (average of $158). Flying from Washington, D.C. Dulles Intl Airport to State of Washington in July is currently the most expensive (average of $240). 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 October 30, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 7% on flights from Washington, D.C. Dulles Intl Airport to State of Washington by exploring options for tickets in the evening.

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 December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to State of Washington flight should consider departing on Tuesday afternoons 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.

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

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 October 30, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Washington, such as Alaska Airlines, Delta, and Hawaiian Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,217 reviews

Food

7.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
11,217 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Food

7.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
7.9
Good
7,998 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Food

7.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Hawaiian Airlines
7.8
Good
2,797 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Food

7.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,998 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Food

7.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
American Airlines
7.2
Good
11,035 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Food

7.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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 59m. Delta provides one of the quickest options available for as low as $238. Airlines will cover a distance of 2299 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to State of Washington one-way?

    One-way options have recently been found by users for as low as $139 on Delta. Other airlines that offer cheap prices include United Airlines from $139 and Southwest from $154 one-way.

  • 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 Japan Airlines (100%), Finnair (100%) and United Airlines (97%).

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

    On average you can expect to pay $1,000 for a flight from Washington, D.C. Dulles Intl Airport to State of Washington. The cheapest flight overall is $139 while the most popular route, (Washington, D.C. Dulles Intl - Seattle/Tacoma Intl) is currently priced at $227.

  • 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, April is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to State of Washington (average of $158). Flying from Washington, D.C. Dulles Intl Airport to State of Washington in July is currently the most expensive (average of $240). 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.
Dulles Intl to Dallas/Fort Worth flights
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Baltimore to San Francisco flights
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Baltimore to Atlanta flights
Reagan-National to Fort Lauderdale flights
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Baltimore to Midway flights
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Reagan-National to Tampa flights
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Baltimore to New Orleans flights
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Top 7 airlines flying from Dulles Intl to Washington

Discover the top 7 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$111Average$260FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$149Average$393FlexibilityNo cancel feeOn-time85%
DeltaCheapest$186Average$394FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$260Average$500FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$277Average$449FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$321Average$527FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$367Average$498FlexibilityNo cancel feeOn-time63%

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