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Dulles Intl

$265+ Cheap flights from Billings (BIL) 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — IAD
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheap flight deals from Billings to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Billings (BIL) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$383
(Alaska Airlines)

One-way from

$265
(Alaska Airlines)

Popular in

September

Cheapest in

January

Average price

$640
Provider with most accurate pricing for Billings Logan Intl-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Billings Logan Intl-Washington, D.C. Dulles Intl flights.
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From Billings Logan Intl to Washington, D.C. Dulles Intl
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One-way flight from Billings Logan Intl to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 21% potential increase in price ($145 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Billings to Dulles Intl

Cheapest flights from Billings to Dulles Intl
Explore the most affordable flight options available from Billings to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This Delta deal was found by Cheapflights users on 10/27. 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.
Wed 12/176:22 pmBIL - IAD
2 stops12h 49mDelta
Tue 12/305:29 pmIAD - BIL
2 stops7h 50mDelta
Deal found 10/27$419
This United Airlines deal was found by Cheapflights users on 10/25. 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 12/810:54 amBIL - IAD
1 stop6h 14mUnited Airlines
Mon 12/810:23 pmIAD - BIL
2 stops19h 03mUnited Airlines
Deal found 10/25$450
This Delta deal was found by Cheapflights users on 10/27. 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.
Thu 12/1811:47 amBIL - IAD
2 stops10h 25mDelta
Tue 12/305:29 pmIAD - BIL
2 stops7h 50mDelta
Deal found 10/27$465
This Delta deal was found by Cheapflights users on 10/27. 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.
Wed 12/176:22 pmBIL - IAD
2 stops12h 49mDelta
Fri 1/26:00 amIAD - BIL
1 stop19h 19mDelta
Deal found 10/27$468
This Delta deal was found by Cheapflights users on 10/27. 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.
Wed 12/176:22 pmBIL - IAD
2 stops12h 49mDelta
Wed 12/3112:32 pmIAD - BIL
2 stops12h 47mDelta
Deal found 10/27$478
This Delta deal was found by Cheapflights users on 10/27. 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.
Wed 12/176:22 pmBIL - IAD
2 stops12h 49mDelta
Thu 1/16:00 amIAD - BIL
2 stops19h 19mDelta
Deal found 10/27$479
This Delta deal was found by Cheapflights users on 10/27. 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.
Fri 12/196:25 amBIL - IAD
1 stop15h 37mDelta
Tue 12/305:29 pmIAD - BIL
2 stops7h 50mDelta
Deal found 10/27$491
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Wed 12/1710:54 amBIL - IAD
1 stop6h 14mUnited Airlines
Thu 1/16:20 amIAD - BIL
1 stop9h 04mUnited Airlines
Deal found 10/27$499
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Thu 12/182:40 pmBIL - IAD
1 stop6h 43mUnited Airlines
Thu 1/16:20 amIAD - BIL
1 stop9h 04mUnited Airlines
Deal found 10/27$505

Cheapflights Fare Finder

 
Customize your flight search to find flights from Billings 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 28, 2025.
Use the filters below to find and compare flights from Billings to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Billings

Fly to

Dulles Intl

Route

Depart

Return

Price

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Tue 3/10

7:40 am-5:55 pm

1 stop8h 15m

Washington, D.C. Dulles Intl

Wed 3/11

7:00 am-10:43 pm

1 stop17h 43m

$435

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Tue 3/10

6:15 am-1:55 pm

1 stop5h 40m

Washington, D.C. Dulles Intl

Wed 3/11

10:05 am-10:37 pm

2 stops14h 32m

$449

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Mon 12/8

10:54 am-7:08 pm

1 stop6h 14m

Washington, D.C. Dulles Intl

Mon 12/8

10:23 pm-3:26 pm

2 stops19h 03m

$450

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Thu 12/18

11:47 am-12:12 am

2 stops10h 25m

Washington, D.C. Dulles Intl

Tue 12/30

5:29 pm-11:19 pm

2 stops7h 50m

$465

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Wed 12/17

6:25 am-6:12 pm

1 stop9h 47m

Washington, D.C. Dulles Intl

Tue 12/30

5:29 pm-11:19 pm

2 stops7h 50m

$467

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Wed 12/17

6:22 pm-9:11 am

2 stops12h 49m

Washington, D.C. Dulles Intl

Wed 12/31

6:00 am-11:19 pm

1 stop19h 19m

$467

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Sat 11/15

7:19 pm-6:23 am

1 stop9h 04m

$265

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Fri 11/14

7:19 pm-6:23 am

1 stop9h 04m

$265

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Sat 12/20

2:40 pm-11:23 pm

1 stop6h 43m

$275

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Fri 11/14

5:18 am-6:19 pm

2 stops11h 01m

$281

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 14 results
1
2

Compare providers for flights from Billings to Dulles Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Billings to Dulles Intl in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Billings-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Billings-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Billings-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Billings-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Billings-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Billings to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Billings 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.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated October 28, 2025.
See what other customers who have flown with United Airlines from Billings to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,997 reviews

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,997 reviews
United Airlines
7.4
Good
8,997 reviews

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

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

  • What airport do you fly from for flights from Billings to Washington, D.C. Dulles Intl?

    Located just 2.7 mi from the city center, Billings Logan Intl is the airport most travelers will use when flying to Washington, D.C. Dulles Intl from Billings. Booking flights from Billings Logan Intl (BIL) to Washington, D.C. Dulles Intl should be relatively easy as there are 0 daily outbound flights to Washington, D.C. Dulles Intl from 1 airline.

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

    Departing from Billings to Washington, D.C. Dulles Intl Airport will take you 5h 40m. The distance from Billings to Washington, D.C. Dulles Intl Airport is about 1643 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Billings to Washington, D.C. Dulles Intl Airport round-trip?

    Our cheapest airline available from Billings to Washington, D.C. Dulles Intl Airport is United Airlines. Our recent data shows that you can find tickets from as low as $373 on this airline. United Airlines is currently priced 31% below the average price you’ll pay for this route.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Billings 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.

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
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Bowie

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Billings to Dulles Intl

Discover the top airline that operate flights from Billings 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 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$373Average$619FlexibilityNo cancel feeOn-time69%

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