$269+ Cheap flights from Billings (BIL) to Dulles Intl (IAD)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — IAD
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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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
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Last-minute
One-way
Cheapest flights from Billings to Dulles IntlExplore 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 September 10, 2026.
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 September 10, 2026.
This Expedia deal was found by Cheapflights users on 9/5. 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 10/2712:05 pm -
1 stop9h 54m
Sat 10/317:02 am -
1 stop13h 50m
Deal found 9/5![Alaska Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 9/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:21 pm -
1 stop8h 02m
Sat 10/313:08 pm -
1 stop8h 04m
Deal found 9/8![American Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 9/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:58 pm -
1 stop8h 37m
Sat 10/3111:10 am -
2 stops13h 15m
Deal found 9/8![Delta logo]()
$366
This Delta deal was found by Cheapflights users on 9/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:58 pm -
1 stop8h 37m
Mon 11/22:28 pm -
1 stop7h 47m
Deal found 9/8![Delta logo]()
$379
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Wed 10/281:21 pm -
1 stop8h 02m
Mon 11/22:42 pm -
1 stop7h 58m
Deal found 9/5![American Airlines logo]()
$398
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 10/175:00 am -
1 stop6h 30m
Wed 10/212:43 pm -
1 stop8h 27m
Deal found 9/9![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 9/9. 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 11/56:30 am -
1 stop5h 18m
Fri 11/1312:32 pm -
2 stops9h 05m
Deal found 9/9![Delta logo]()
$434
Best flights from Billings to Dulles IntlDiscover carefully curated flight deals from Billings to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from Billings to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Tue 10/271:21 pm -
1 stop8h 02m
Sat 10/315:01 am -
2 stops9h 50m
Deal found 9/5![American Airlines logo]()
$364
This Delta deal was found by Cheapflights users on 9/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:58 pm -
2 stops9h 44m
Sat 10/3111:10 am -
2 stops13h 15m
Deal found 9/8![Delta logo]()
$371
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Tue 1/262:42 pm -
1 stop6h 31m
Sat 1/302:25 pm -
1 stop8h 54m
Deal found 9/7![United Airlines logo]()
$479
This Alaska Airlines deal was found by Cheapflights users on 9/5. 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 1/2612:09 pm -
1 stop26h 18m
Sat 1/305:30 pm -
1 stop19h 59m
Deal found 9/5![Alaska Airlines logo]()
$513
Last-minute flights from Billings to Dulles IntlDiscover last-minute flight deals from Billings to Dulles Intl. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to Dulles Intl. Data last updated September 10, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 10/175:00 am -
1 stop6h 30m
Wed 10/212:43 pm -
1 stop8h 27m
Deal found 9/9![United Airlines logo]()
$429
This Expedia deal was found by Cheapflights users on 9/5. 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 10/2712:05 pm -
1 stop9h 54m
Sat 10/317:02 am -
1 stop13h 50m
Deal found 9/5![Alaska Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 9/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:21 pm -
1 stop8h 02m
Sat 10/313:08 pm -
1 stop8h 04m
Deal found 9/8![American Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 9/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:58 pm -
1 stop8h 37m
Sat 10/3111:10 am -
2 stops13h 15m
Deal found 9/8![Delta logo]()
$366
This Delta deal was found by Cheapflights users on 9/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:58 pm -
1 stop8h 37m
Mon 11/22:28 pm -
1 stop7h 47m
Deal found 9/8![Delta logo]()
$379
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Wed 10/281:21 pm -
1 stop8h 02m
Mon 11/22:42 pm -
1 stop7h 58m
Deal found 9/5![American Airlines logo]()
$398
One-way flights from Billings to Dulles IntlSearch for one-way flight options from Billings to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from Billings to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Priceline deal was found by Cheapflights users on 9/5. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:32 pm -
1 stop8h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Alaska Airlines logo]()
$269
This American Airlines deal was found by Cheapflights users on 9/9. 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 9/177:00 am -
1 stop8h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![American Airlines logo]()
$276
This United Airlines deal was found by Cheapflights users on 9/6. 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 10/145:57 pm -
1 stop9h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![United Airlines logo]()
$311
This United Airlines deal was found by Cheapflights users on 9/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/184:07 pm -
1 stop6h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![United Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 9/9. 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 11/205:35 am -
2 stops10h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Delta logo]()
$338
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 9/197:00 am -
1 stop8h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![United Airlines logo]()
$371
This Delta deal was found by Cheapflights users on 9/9. 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 9/176:23 am -
2 stops13h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Delta logo]()
$455
This Delta deal was found by Cheapflights users on 9/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:33 pm -
2 stops15h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Delta logo]()
$485
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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $359 (American Airlines) |
One-way from | $269 (Priceline) |
Popular in | September |
Cheapest in | August |
Average price | $927 |
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 7,457,451 searches. Data last updated September 10, 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
Cheapest round-trip
Quickest round-trip
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Sun 10/11
7:32 pm-5:40 am
1 stop8h 08m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$269
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Thu 9/17
7:00 am-5:51 pm
1 stop8h 51m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$276
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Wed 10/14
5:57 pm-5:17 am
1 stop9h 20m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$311
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Fri 11/20
5:35 am-6:17 pm
2 stops10h 42m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$338
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Tue 10/27
1:21 pm-11:23 pm
1 stop8h 02m
Washington, D.C. Dulles Intl
Sat 10/31
5:01 am-12:51 pm
2 stops9h 50m
$364
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Sat 9/19
7:00 am-5:52 pm
1 stop8h 52m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$371
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Tue 10/27
12:58 pm-12:42 am
2 stops9h 44m
Washington, D.C. Dulles Intl
Sat 10/31
11:10 am-10:25 pm
2 stops13h 15m
$371
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Thu 9/17
6:23 am-9:44 pm
2 stops13h 21m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$455
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Tue 1/26
2:42 pm-11:13 pm
1 stop6h 31m
Washington, D.C. Dulles Intl
Sat 1/30
2:25 pm-9:19 pm
1 stop8h 54m
$479
BillingsWashington, D.C.
BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl
BILIAD
Billings Logan Intl
Tue 1/26
12:09 pm-4:27 pm
1 stop26h 18m
Washington, D.C. Dulles Intl
Sat 1/30
5:30 pm-11:29 am
1 stop19h 59m
$513
Sorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
BIL-IAD
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 September 10, 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.
Entertainment
7.1
Boarding
7.7
Crew
8.1
Comfort
7.3
Food
6.6
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Entertainment
7.1
Boarding
7.7
Crew
8.1
Comfort
7.3
Food
6.6
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
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.
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 locationsAlexandria
Arlington
Owings Mills
Tysons
Lanham
Reston
Chantilly
Herndon
Rockville
Hyattsville
Fredericksburg
Woodbridge
Falls Church
Sterling
Hanover
Laurel
Oxon Hill
Clinton
Hunt Valley
Silver Spring
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Other flights to Dulles Intl
Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 10, 2026.
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Billings and Dulles Intl flights
Browse other Billings and Dulles Intl flight options. Last updated on September 10, 2026.
Other flights from Billings
Browse through other flights departing from Billings. Flights are based on user searches made on Cheapflights and were last updated on September 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$350 | Average$488 | FlexibilityNo cancel fee | On-time69% |