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Dulles Intl

$125+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — IAD
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
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 December 23, 2025.

This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:53 amBZN - IAD
1 stop9h 34mDelta
Thu 1/16:00 amIAD - BZN
1 stop7h 26mDelta
Deal found 12/21$485
This Delta deal was found by Cheapflights users on 12/22. 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.
Wed 12/241:55 pmFCA - IAD
1 stop6h 18mDelta
Sun 1/44:17 pmIAD - FCA
2 stops10h 29mDelta
Deal found 12/22$489
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2212:42 pmBZN - IAD
1 stop6h 39mUnited Airlines
Mon 12/296:20 amIAD - BZN
1 stop9h 17mUnited Airlines
Deal found 12/21$505
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:41 amBZN - IAD
1 stop6h 09mUnited Airlines
Tue 12/302:24 pmIAD - BZN
1 stop8h 44mUnited Airlines
Deal found 12/21$575
This Southwest deal was found by Cheapflights users on 12/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:15 amBZN - IAD
2 stops11h 10mSouthwest
Mon 12/297:50 pmIAD - BZN
1 stop6h 35mSouthwest
Deal found 12/21$634
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:55 amBIL - IAD
1 stop8h 30mUnited Airlines
Wed 12/316:20 amIAD - BIL
1 stop9h 04mUnited Airlines
Deal found 12/21$656
This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2611:52 amBIL - IAD
1 stop9h 26mDelta
Thu 1/112:58 pmIAD - BIL
2 stops12h 21mDelta
Deal found 12/21$661
This United Airlines deal was found by Cheapflights users on 12/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:15 amGTF - IAD
1 stop7h 19mUnited Airlines
Sat 1/34:00 pmIAD - GTF
1 stop8h 46mUnited Airlines
Deal found 12/20$692
This United Airlines deal was found by Cheapflights users on 12/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:15 amGTF - IAD
1 stop7h 19mUnited Airlines
Sat 1/36:20 amIAD - GTF
1 stop9h 19mUnited Airlines
Deal found 12/20$697
This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:52 amBIL - IAD
1 stop9h 26mDelta
Wed 12/3112:58 pmIAD - BIL
2 stops12h 21mDelta
Deal found 12/21$706
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/212:38 pmMSO - IAD
1 stop6h 45mUnited Airlines
Wed 12/318:20 amIAD - MSO
1 stop9h 50mUnited Airlines
Deal found 12/21$731
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/232:40 pmBIL - IAD
1 stop6h 43mUnited Airlines
Tue 12/302:24 pmIAD - BIL
1 stop9h 00mUnited Airlines
Deal found 12/21$731

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 December 23, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$250
(Delta)

One-way from

$125
(Delta)

Popular in

August

Cheapest in

September

Average price

$418

Good round-trip deal

$373 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.
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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. 4% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Price to beat on a round-trip 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 December 23, 2025.
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

Montana

Fly to

Dulles Intl

Route

Depart

Return

Price

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Wed 1/14

7:23 am-11:57 pm

2 stops14h 34m

Washington, D.C. Dulles Intl

Sat 1/17

7:30 am-2:20 pm

1 stop8h 50m

$250

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Tue 1/13

7:23 am-11:48 pm

2 stops14h 25m

Washington, D.C. Dulles Intl

Fri 1/23

7:30 am-2:20 pm

1 stop8h 50m

$250

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Thu 1/29

2:39 pm-12:24 am

1 stop7h 45m

Washington, D.C. Dulles Intl

Sun 2/1

7:30 am-2:20 pm

1 stop8h 50m

$267

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Tue 1/27

2:39 pm-12:24 am

1 stop7h 45m

Washington, D.C. Dulles Intl

Tue 2/3

7:30 am-2:20 pm

1 stop8h 50m

$267

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Wed 2/18

1:46 pm-10:48 pm

1 stop7h 02m

Washington, D.C. Dulles Intl

Thu 2/26

6:00 am-2:51 pm

1 stop10h 51m

$289

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Wed 1/14

6:15 am-4:35 pm

1 stop8h 20m

Washington, D.C. Dulles Intl

Sat 1/17

2:24 pm-9:33 pm

1 stop9h 09m

$289

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Wed 1/14

3:35 pm-4:26 pm

1 stop22h 51m

Washington, D.C. Dulles Intl

Sat 1/17

6:04 pm-11:36 pm

1 stop31h 32m

$314

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Thu 2/26

7:00 am-5:20 pm

1 stop8h 20m

Washington, D.C. Dulles Intl

Tue 3/3

7:05 am-11:38 pm

1 stop18h 33m

$314

MissoulaWashington, D.C.

MSO - IAD

MSOIAD

Missoula Johnson-Bell Field

Wed 1/21

6:23 am-4:26 pm

1 stop8h 03m

Washington, D.C. Dulles Intl

Sat 1/24

6:04 pm-12:23 pm

1 stop20h 19m

$334

MissoulaWashington, D.C.

MSO - IAD

MSOIAD

Missoula Johnson-Bell Field

Mon 1/12

5:00 am-11:10 pm

2 stops16h 10m

Washington, D.C. Dulles Intl

Wed 1/21

7:30 am-12:28 am

2 stops18h 58m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 60 results
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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 $230). Flying from Montana to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of $473). 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 December 23, 2025.

It’s optimal to fly from Montana to Washington, D.C. Dulles Intl Airport in the evening. By choosing this option you can save up to 24% on the cost of your flight, compared to a flight in the morning.

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?

    Delta, Alaska Airlines, and United Airlines can get you from Montana to Washington, D.C. Dulles Intl Airport in just under 9h 19m. Your travel time can differ by up to 13h 32m. The distance between Montana and Washington, D.C. Dulles Intl Airport is about 1928 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 $134 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 Kalispell Glacier Park - Washington, D.C. Dulles Intl or Billings Logan Intl - Washington, D.C. Dulles Intl, Missoula Johnson-Bell Field - 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 $489, our data shows the cheapest flight currently is $359. When looking at the most popular route, (Missoula Johnson-Bell Field - Washington, D.C. Dulles Intl), you can expect to pay $343 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 $230). Flying from Montana to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of $473). 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
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

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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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Orlando to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Boston to Reagan-National flights
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Atlanta to Reagan-National flights
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San Francisco to Reagan-National flights
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Hobby to Baltimore flights
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Orlando to Baltimore flights
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Miami to Baltimore flights
John F Kennedy Intl to Reagan-National flights
Denver to Baltimore flights
Minneapolis to Reagan-National flights
Fort Lauderdale to Baltimore flights
George Bush Intcntl to Reagan-National flights
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Denver to Reagan-National flights
George Bush Intcntl to Baltimore flights
Minneapolis to Dulles Intl flights
Sky Harbor Intl to Dulles Intl flights
Fort Lauderdale to Reagan-National flights
Miami to Reagan-National flights
LaGuardia to Reagan-National flights
Fort Lauderdale to Dulles Intl flights
Tampa to Baltimore flights
Charlotte to Dulles Intl flights
Tampa to Reagan-National flights

Top 3 airlines flying from Montana to Dulles Intl

Discover the top 3 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 December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$220Average$288FlexibilityNo cancel feeOn-time63%
DeltaCheapest$231Average$368FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$256Average$595FlexibilityNo cancel feeOn-time69%

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