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Dulles Intl

$157+ Cheap flights from Montana 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — IAD
Aug 17 — Aug 241
Mon 8/17
Mon 8/24
1 adult, Economy
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Cheap flight deals from Montana to Dulles Intl

Cheapest flights from Montana to Dulles Intl
Explore the most affordable flight options available from Montana to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1710:00 am
BIL
-
IAD
1 stop20h 04m
Multiple Airlines
Mon 8/248:59 am
IAD
-
BIL
1 stop13h 09m
Multiple Airlines
Deal found 7/12$253
This Kiwi.com deal was found by Cheapflights users on 7/13. 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.
Thu 8/134:51 pm
BZN
-
IAD
1 stop13h 29m
Multiple Airlines
Thu 8/278:59 am
IAD
-
BZN
1 stop9h 07m
Multiple Airlines
Deal found 7/13$296
This Kiwi.com deal was found by Cheapflights users on 7/17. 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.
Thu 8/610:24 am
MSO
-
IAD
2 stops49h 38m
Multiple Airlines
Wed 8/129:50 am
IAD
-
MSO
1 stop25h 44m
Multiple Airlines
Deal found 7/17$334
This Delta deal was found by Cheapflights users on 7/13. 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 10/201:13 pm
GTF
-
IAD
1 stop8h 22m
Delta
Sat 10/247:00 am
IAD
-
GTF
1 stop7h 33m
Delta
Deal found 7/13$338
This United Airlines deal was found by Cheapflights users on 7/15. 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 9/37:55 am
BZN
-
IAD
1 stop6h 07m
United Airlines
Sun 9/68:15 am
IAD
-
BZN
Nonstop4h 27m
United Airlines
Deal found 7/15$339
This United Airlines deal was found by Cheapflights users on 7/16. 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 8/264:30 pm
BZN
-
IAD
1 stop6h 14m
United Airlines
Wed 9/27:00 am
IAD
-
BZN
1 stop9h 13m
United Airlines
Deal found 7/16$344
This Delta deal was found by Cheapflights users on 7/16. 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 12/1112:50 pm
MSO
-
IAD
1 stop8h 56m
Delta
Tue 1/53:00 pm
IAD
-
MSO
1 stop7h 12m
Delta
Deal found 7/16$349
This American Airlines deal was found by Cheapflights users on 7/13. 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 8/206:26 am
BZN
-
IAD
1 stop9h 22m
American Airlines
Tue 8/256:10 am
IAD
-
BZN
1 stop7h 53m
American Airlines
Deal found 7/13$349
This Delta deal was found by Cheapflights users on 7/14. 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.
Sun 9/66:26 am
BIL
-
IAD
1 stop5h 43m
Delta
Sat 9/192:22 pm
IAD
-
BIL
1 stop7h 45m
Delta
Deal found 7/14$349
This Delta deal was found by Cheapflights users on 7/16. 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 12/1112:50 pm
MSO
-
IAD
1 stop8h 56m
Delta
Fri 1/83:00 pm
IAD
-
MSO
2 stops11h 31m
Delta
Deal found 7/16$354
This Delta deal was found by Cheapflights users on 7/13. 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 10/275:30 am
MSO
-
IAD
2 stops12h 44m
Delta
Fri 10/308:00 am
IAD
-
MSO
2 stops13h 54m
Delta
Deal found 7/13$359
This Delta deal was found by Cheapflights users on 7/16. 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 10/201:10 pm
BZN
-
IAD
1 stop8h 25m
Delta
Thu 10/297:00 am
IAD
-
BZN
1 stop7h 05m
Delta
Deal found 7/16$359

Find flight deals from Montana to Dulles Intl

Keep the following information in mind while searching for Montana to Dulles Intl flight deals. Data was last updated July 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$296
(Kiwi.com)

One-way from

$157
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$493

Good one-way deal

$241 or less
Provider with most accurate pricing for Bozeman Gallatin Field-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bozeman Gallatin Field-Washington, D.C. (WAS) flights.
Search Deals
From Montana to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Montana to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a one-way flight from Montana to Washington, D.C. Dulles Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Montana 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 18, 2026.
Use the filters below to find and compare flights from Montana 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

Mon 8/17

10:00 am-8:04 am

1 stop20h 04m

Washington, D.C. Dulles Intl

Mon 8/24

8:59 am-8:08 pm

1 stop13h 09m

$253

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Tue 10/20

12:53 pm-9:11 pm

1 stop6h 18m

Washington, D.C. Dulles Intl

Thu 10/29

6:05 am-11:33 am

1 stop7h 28m

$344

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Wed 10/21

2:07 pm-11:21 pm

1 stop7h 14m

Washington, D.C. Dulles Intl

Thu 10/29

6:00 am-1:20 pm

1 stop9h 20m

$349

MissoulaWashington, D.C.

MSO - IAD

MSOIAD

Missoula Johnson-Bell Field

Mon 12/14

6:10 pm-9:11 am

2 stops13h 01m

Washington, D.C. Dulles Intl

Tue 1/5

1:00 pm-8:12 pm

2 stops9h 12m

$359

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Tue 10/20

1:10 pm-11:35 pm

1 stop8h 25m

Washington, D.C. Dulles Intl

Thu 10/29

7:00 am-12:05 pm

1 stop7h 05m

$359

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 10/20

1:13 pm-11:35 pm

1 stop8h 22m

Washington, D.C. Dulles Intl

Sat 10/24

7:00 am-12:33 pm

1 stop7h 33m

$363

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Mon 10/5

6:21 pm-11:50 am

2 stops15h 29m

Washington, D.C. Dulles Intl

Sat 10/10

7:00 am-12:33 pm

1 stop7h 33m

$369

MissoulaWashington, D.C.

MSO - IAD

MSOIAD

Missoula Johnson-Bell Field

Tue 12/15

12:50 pm-11:46 pm

1 stop8h 56m

Washington, D.C. Dulles Intl

Thu 1/7

3:00 pm-8:12 pm

1 stop7h 12m

$374

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Thu 9/10

1:21 pm-10:59 pm

1 stop7h 38m

Washington, D.C. Dulles Intl

Sun 9/13

1:10 pm-7:17 pm

1 stop8h 07m

$376

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Thu 8/13

4:30 pm-12:44 am

1 stop6h 14m

Washington, D.C. Dulles Intl

Sun 8/16

6:15 am-11:40 am

1 stop7h 25m

$377

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/13

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Montana to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Montana 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 Montana to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from Montana to Washington, D.C. Dulles Intl Airport?

Currently, November is the cheapest month in which you can book a flight from Montana to Washington, D.C. Dulles Intl Airport (average of $371). Flying from Montana to Washington, D.C. Dulles Intl Airport in March is currently the most expensive (average of $1,161). 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 MT to IAD?

Find hourly flight availability from Montana to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 18, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Montana to Washington, D.C. Dulles Intl Airport as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Montana to Dulles Intl. 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 Montana to Washington, D.C. Dulles Intl Airport?

    United Airlines, Delta, and Alaska Airlines can get you from Montana to Washington, D.C. Dulles Intl Airport in just under 6h 18m. Your travel time can differ by up to 1h 50m. The distance between Montana and Washington, D.C. Dulles Intl Airport is about 1768 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $85. Users have also found prices from $113 and $164 on Delta and United Airlines, respectively.

  • What are the most popular routes from Montana to Washington, D.C. Dulles Intl Airport?

    While some choose either Bozeman Gallatin Field - Washington, D.C. Dulles Intl or Missoula Johnson-Bell Field - Washington, D.C. Dulles Intl, Billings Logan Intl - Washington, D.C. Dulles Intl is the most popular route from Montana to Washington, D.C. Dulles Intl Airport.

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

    While on average a flight from Montana to Washington, D.C. Dulles Intl Airport is generally $431, our data shows the cheapest flight currently is $198. When looking at the most popular route, (Billings Logan Intl - Washington, D.C. Dulles Intl), you can expect to pay $349 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Montana 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.

  • What is the cheapest month to book a flight from Montana to Washington, D.C. Dulles Intl Airport?

    Currently, November is the cheapest month in which you can book a flight from Montana to Washington, D.C. Dulles Intl Airport (average of $371). Flying from Montana to Washington, D.C. Dulles Intl Airport in March is currently the most expensive (average of $1,161). 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.

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Montana to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Boston to Reagan-National flights
Dallas/Fort Worth to Reagan-National flights
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Boston to Baltimore flights
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Atlanta to Baltimore flights
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Seattle to Reagan-National flights
Hobby to Dulles Intl flights
O'Hare Intl to Reagan-National flights
San Francisco to Reagan-National flights
San Francisco to Baltimore flights
Hobby to Reagan-National flights
Orlando to Dulles Intl flights
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Orlando to Reagan-National flights
Tampa to Baltimore flights
George Bush Intcntl to Reagan-National flights
O'Hare Intl to Dulles Intl flights
Seattle to Baltimore flights
Minneapolis to Reagan-National flights
Minneapolis to Baltimore flights
Ontario to Dulles Intl flights
John F Kennedy Intl to Dulles Intl flights
Minneapolis to Dulles Intl flights
Austin to Dulles Intl flights
Miami to Reagan-National flights
Miami to Dulles Intl flights
Detroit to Dulles Intl flights
Denver to Reagan-National flights
Detroit to Reagan-National flights
Tampa to Reagan-National flights
Fort Lauderdale to Dulles Intl flights
Sky Harbor Intl to Dulles Intl flights
Miami to Baltimore flights

Top 4 airlines flying from Montana to Dulles Intl

Discover the top 4 airlines that operate flights from Montana 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 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$241Average$355FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$256Average$518FlexibilityNo cancel feeOn-time69%
DeltaCheapest$277Average$496FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$384Average$484FlexibilityNo cancel feeOn-time75%

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