HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$136+ 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — IAD
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Billings to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 July 24, 2026.

This Delta deal was found by Cheapflights users on 7/18. 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 10/2812:58 pm
BIL
-
IAD
1 stop8h 37m
Delta
Wed 11/47:00 am
IAD
-
BIL
1 stop7h 18m
Delta
Deal found 7/18$349
This Delta deal was found by Cheapflights users on 7/18. 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.
Mon 8/176:24 pm
BIL
-
IAD
2 stops12h 56m
Delta
Mon 8/246:49 pm
IAD
-
BIL
1 stop6h 41m
Delta
Deal found 7/18$354
This Delta deal was found by Cheapflights users on 7/20. 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 9/36:24 pm
BIL
-
IAD
2 stops12h 56m
Delta
Tue 9/85:15 pm
IAD
-
BIL
2 stops8h 00m
Delta
Deal found 7/20$359
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/1010:00 am
BIL
-
IAD
1 stop20h 20m
Multiple Airlines
Sun 8/169:50 am
IAD
-
BIL
1 stop25h 20m
Multiple Airlines
Deal found 7/21$362
This Delta deal was found by Cheapflights users on 7/22. 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 9/36:24 pm
BIL
-
IAD
2 stops12h 56m
Delta
Sun 9/67:00 am
IAD
-
BIL
1 stop7h 15m
Delta
Deal found 7/22$364
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/1010:00 am
BIL
-
IAD
1 stop20h 20m
Multiple Airlines
Sat 8/159:30 am
IAD
-
BIL
2 stops33h 33m
Multiple Airlines
Deal found 7/21$366
This Delta deal was found by Cheapflights users on 7/19. 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 8/156:24 pm
BIL
-
IAD
2 stops12h 56m
Delta
Tue 8/256:49 pm
IAD
-
BIL
1 stop6h 41m
Delta
Deal found 7/19$379

Find 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 July 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$354
(Delta)

One-way from

$136
(Kiwi.com)

Popular in

March

Cheapest in

December

Average price

$473
Provider with most accurate pricing for Billings Logan Intl-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Billings Logan Intl-Washington, D.C. Dulles Intl flights.
Search Deals
From Billings Logan Intl to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Billings Logan Intl to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($159 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 24, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Wed 10/28

12:58 pm-11:35 pm

1 stop8h 37m

Washington, D.C. Dulles Intl

Wed 11/4

7:00 am-12:18 pm

1 stop7h 18m

$349

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Thu 9/3

6:24 pm-9:20 am

2 stops12h 56m

Washington, D.C. Dulles Intl

Sun 9/6

7:00 am-12:15 pm

1 stop7h 15m

$354

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Thu 9/3

6:24 pm-9:20 am

2 stops12h 56m

Washington, D.C. Dulles Intl

Tue 9/8

5:15 pm-11:15 pm

2 stops8h 00m

$359

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Mon 8/17

6:24 pm-9:20 am

2 stops12h 56m

Washington, D.C. Dulles Intl

Mon 8/24

12:30 pm-10:25 pm

2 stops11h 55m

$359

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Mon 8/10

10:00 am-8:20 am

1 stop20h 20m

Washington, D.C. Dulles Intl

Sat 8/15

8:33 pm-9:10 am

2 stops38h 37m

$377

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Sat 8/15

6:24 pm-9:20 am

2 stops12h 56m

Washington, D.C. Dulles Intl

Tue 8/25

6:49 pm-11:30 pm

1 stop6h 41m

$389

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Wed 9/23

12:20 pm-11:59 pm

1 stop9h 39m

Washington, D.C. Dulles Intl

Mon 9/28

7:00 am-11:40 am

1 stop30h 40m

$401

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Mon 9/28

6:33 pm-11:45 am

2 stops15h 12m

Washington, D.C. Dulles Intl

Wed 9/30

6:47 pm-11:15 pm

1 stop6h 28m

$408
Cheapest one-way
Quickest one-way

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Sat 9/12

6:23 am-1:31 pm

1 stop5h 08m

$175

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Thu 9/3

6:24 pm-9:20 am

2 stops12h 56m

$180

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/19

Showing 1-10 of 17 resultsSorted by cheapest first
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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*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 FlightHub the most. FlightHub 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 July 24, 2026.
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
10,024 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
10,024 reviews
United Airlines
7.4
Good
10,024 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 8h 37m. The distance from Billings to Washington, D.C. Dulles Intl Airport is about 1643 mi.

  • 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 $350 on this airline.

  • 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
Tysons
Arlington
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Falls Church
Hanover
Manassas
Laurel
Sterling
Clinton
Hunt Valley
Cordova

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 July 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$350Average$488FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights