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Dulles Intl

$159+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — IAD
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
1 adult, Economy
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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 March 13, 2026.

This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 10/247:17 pm
BIL
-
IAD
1 stop10h 11m
Alaska Airlines
Wed 10/285:38 pm
IAD
-
BIL
1 stop8h 30m
Alaska Airlines
Deal found 3/8$329
This Alaska Airlines deal was found by Cheapflights users on 3/7. 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.
Wed 4/157:56 am
BIL
-
IAD
1 stop19h 44m
Alaska Airlines
Tue 4/217:00 am
IAD
-
BIL
1 stop18h 58m
Alaska Airlines
Deal found 3/7$375
This Delta deal was found by Cheapflights users on 3/12. 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 4/16:25 am
BIL
-
IAD
1 stop5h 07m
Delta
Fri 4/102:15 pm
IAD
-
BIL
1 stop8h 04m
Delta
Deal found 3/12$378
This Alaska Airlines deal was found by Cheapflights users on 3/7. 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 4/137:56 am
BIL
-
IAD
1 stop19h 44m
Alaska Airlines
Tue 4/217:00 am
IAD
-
BIL
1 stop18h 58m
Alaska Airlines
Deal found 3/7$385
This United Airlines deal was found by Cheapflights users on 3/10. 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 4/12:35 pm
BIL
-
IAD
1 stop6h 59m
United Airlines
Sun 4/52:21 pm
IAD
-
BIL
1 stop8h 36m
United Airlines
Deal found 3/10$387
This Alaska Airlines deal was found by Cheapflights users on 3/7. 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.
Tue 4/142:05 pm
BIL
-
IAD
1 stop13h 35m
Alaska Airlines
Wed 4/227:20 pm
IAD
-
BIL
1 stop29h 39m
Alaska Airlines
Deal found 3/7$390
This Delta deal was found by Cheapflights users on 3/12. 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 4/16:25 am
BIL
-
IAD
1 stop5h 07m
Delta
Thu 4/92:15 pm
IAD
-
BIL
1 stop8h 04m
Delta
Deal found 3/12$404
This Delta deal was found by Cheapflights users on 3/12. 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.
Tue 3/316:25 am
BIL
-
IAD
1 stop5h 07m
Delta
Fri 4/102:15 pm
IAD
-
BIL
1 stop8h 04m
Delta
Deal found 3/12$414
This Expedia deal was found by Cheapflights users on 3/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/142:05 pm
BIL
-
IAD
2 stops25h 17m
Alaska Airlines
Tue 4/217:00 am
IAD
-
BIL
1 stop18h 58m
Alaska Airlines
Deal found 3/7$416
This United Airlines deal was found by Cheapflights users on 3/7. 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 4/132:35 pm
BIL
-
IAD
1 stop6h 59m
United Airlines
Wed 4/222:21 pm
IAD
-
BIL
1 stop8h 36m
United Airlines
Deal found 3/7$419

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 March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$378
(Delta)

One-way from

$159
(Alaska Airlines)

Popular in

September

Cheapest in

May

Average price

$476
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. 9% potential increase in price ($62 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 March 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 March 13, 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

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Wed 4/15

7:56 am-5:40 am

1 stop19h 44m

Washington, D.C. Dulles Intl

Tue 4/21

7:00 am-11:58 pm

1 stop18h 58m

$375
Quickest round-trip

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Tue 3/31

6:25 am-1:32 pm

1 stop5h 07m

Washington, D.C. Dulles Intl

Wed 4/8

2:15 pm-8:19 pm

1 stop8h 04m

$414

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Tue 3/31

6:25 am-1:32 pm

1 stop5h 07m

Washington, D.C. Dulles Intl

Fri 4/10

2:15 pm-8:19 pm

1 stop8h 04m

$414

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Mon 5/11

12:47 pm-5:50 am

2 stops15h 03m

Washington, D.C. Dulles Intl

Sun 5/24

6:00 am-1:21 pm

1 stop9h 21m

$427

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Wed 4/1

6:25 am-10:59 pm

2 stops14h 34m

Washington, D.C. Dulles Intl

Wed 4/8

2:15 pm-8:19 pm

1 stop8h 04m

$457

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Mon 4/13

7:56 am-5:40 am

1 stop19h 44m

Washington, D.C. Dulles Intl

Mon 4/20

7:00 am-11:54 am

1 stop30h 54m

$490

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Fri 8/14

2:25 pm-12:40 am

1 stop8h 15m

Washington, D.C. Dulles Intl

Mon 8/24

6:30 am-1:20 pm

1 stop8h 50m

$495

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Fri 4/3

6:25 am-11:41 pm

1 stop15h 16m

Washington, D.C. Dulles Intl

Fri 4/10

2:15 pm-8:19 pm

1 stop8h 04m

$497

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Tue 3/31

7:00 am-4:46 pm

1 stop7h 46m

Washington, D.C. Dulles Intl

Tue 4/7

2:21 pm-8:57 pm

1 stop8h 36m

$520

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Tue 4/21

7:56 am-6:11 pm

1 stop8h 15m

Washington, D.C. Dulles Intl

Tue 4/21

7:11 pm-1:26 pm

2 stops20h 15m

$547

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

Showing 1-10 of 19 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 March.
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 March 13, 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
9,418 reviews

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

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
9,418 reviews
United Airlines
7.4
Good
9,418 reviews

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

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 5h 07m. 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 $239 on this airline. United Airlines is currently priced 57% 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
Owings Mills
Springfield
Silver Spring
Herndon
Hyattsville
Hanover
Laurel
Rockville
Upper Marlboro
Linthicum Heights
Fredericksburg
Largo
Bowie
Clinton
Towson
College Park

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 March 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$239Average$488FlexibilityNo cancel feeOn-time69%

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