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Dulles Intl

$129+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — IAD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap 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 September 15, 2025.

Round-trip from

$194
(Southwest)

One-way from

$129
(Delta)

Popular in

March

Cheapest in

June

Average price

$423

Good round-trip deal

$567 or less

Good one-way deal

$220 or less
From Montana to Washington, D.C. Dulles Intl
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One-way flight from Montana to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 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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Price to beat on a one-way flight from Montana to Washington, D.C. Dulles Intl.
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Find 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 September 15, 2025.

This Southwest deal was found by Cheapflights users on 9/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2911:55 amBZN - IAD
1 stop9h 10mSouthwest
Sat 11/16:40 amIAD - BZN
1 stop11h 50mSouthwest
Deal found 9/14$194
This Southwest deal was found by Cheapflights users on 9/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3010:35 amBZN - IAD
1 stop10h 55mSouthwest
Sat 11/16:40 amIAD - BZN
1 stop11h 50mSouthwest
Deal found 9/14$210
This Southwest deal was found by Cheapflights users on 9/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/135:00 amBZN - IAD
1 stop6h 10mSouthwest
Sun 11/165:05 amIAD - BZN
1 stop6h 30mSouthwest
Deal found 9/14$215
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/12:29 pmBZN - IAD
1 stop6h 51mDelta
Sat 11/87:35 amIAD - BZN
1 stop8h 46mDelta
Deal found 9/15$257
This Delta deal was found by Cheapflights users on 9/13. 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.
Fri 11/73:01 pmBZN - IAD
1 stop7h 39mDelta
Sat 11/156:55 amIAD - BZN
1 stop8h 30mDelta
Deal found 9/13$270
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:15 pmFCA - IAD
1 stop8h 08mHawaiian Airlines
Sat 10/116:25 amIAD - FCA
1 stop7h 57mHawaiian Airlines
Deal found 9/15$290
This Delta deal was found by Cheapflights users on 9/14. 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.
Tue 10/143:01 pmBZN - IAD
1 stop7h 39mDelta
Tue 10/216:18 amIAD - BZN
1 stop8h 34mDelta
Deal found 9/14$298
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 11/44:00 pmBZN - IAD
1 stop11h 27mUnited Airlines
Wed 11/58:15 amIAD - BZN
2 stops15h 25mUnited Airlines
Deal found 9/15$302
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/233:01 pmBZN - IAD
1 stop7h 39mDelta
Sun 10/266:00 amIAD - BZN
2 stops8h 52mDelta
Deal found 9/15$303
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/15:28 pmBZN - IAD
1 stop10h 33mDelta
Wed 10/86:15 amIAD - BZN
1 stop6h 29mDelta
Deal found 9/15$308
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/172:38 pmFCA - IAD
1 stop6h 37mUnited Airlines
Wed 11/262:25 pmIAD - FCA
1 stop9h 19mUnited Airlines
Deal found 9/14$356
This Hawaiian Airlines deal was found by Cheapflights users on 9/13. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:15 pmFCA - IAD
1 stop8h 08mHawaiian Airlines
Sun 10/56:25 amIAD - FCA
1 stop7h 57mHawaiian Airlines
Deal found 9/13$361

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 September 15, 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

Thu 10/30

10:35 am-11:30 pm

1 stop10h 55m

Washington, D.C. Dulles Intl

Sat 11/1

6:40 am-4:30 pm

1 stop11h 50m

$210

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Thu 11/13

5:00 am-1:10 pm

1 stop6h 10m

Washington, D.C. Dulles Intl

Sun 11/16

5:05 am-9:35 am

1 stop6h 30m

$215

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Sat 11/1

2:29 pm-11:20 pm

1 stop6h 51m

Washington, D.C. Dulles Intl

Mon 11/10

6:59 pm-11:34 pm

1 stop6h 35m

$257

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Wed 10/29

2:29 pm-11:20 pm

1 stop6h 51m

Washington, D.C. Dulles Intl

Sun 11/9

7:15 am-2:17 pm

1 stop9h 02m

$257

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Sat 11/1

2:01 pm-11:39 pm

1 stop7h 38m

Washington, D.C. Dulles Intl

Sat 11/8

6:15 am-12:14 pm

1 stop7h 59m

$257

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Thu 2/26

2:00 pm-12:07 am

1 stop8h 07m

Washington, D.C. Dulles Intl

Mon 3/2

6:00 am-1:22 pm

1 stop9h 22m

$257

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Sun 11/2

3:01 pm-12:40 am

1 stop7h 39m

Washington, D.C. Dulles Intl

Mon 11/10

6:59 pm-11:34 pm

1 stop6h 35m

$257

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Sat 11/1

3:01 pm-12:40 am

1 stop7h 39m

Washington, D.C. Dulles Intl

Fri 11/7

7:35 am-2:21 pm

1 stop8h 46m

$257

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Thu 10/30

2:01 pm-11:39 pm

1 stop7h 38m

Washington, D.C. Dulles Intl

Sun 11/9

7:15 am-2:17 pm

1 stop9h 02m

$257

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Mon 11/3

3:01 pm-12:40 am

1 stop7h 39m

Washington, D.C. Dulles Intl

Mon 11/10

6:59 pm-11:34 pm

1 stop6h 35m

$257

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

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, August is the cheapest month in which you can book a flight from Montana to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Montana to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 September 15, 2025.

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.

How much does it cost to fly round-trip from Montana to Washington, D.C. Dulles Intl Airport?

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?

    Southwest, Delta, and United Airlines can get you from Montana to Washington, D.C. Dulles Intl Airport in just under 6h 37m. Your travel time can differ by up to 4h 18m. 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 Delta. According to our data, you can fly for as low as $129. Users have also found prices from $154 and $165 on Alaska Airlines and American Airlines, respectively.

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

    While some choose either Missoula Johnson-Bell Field - Washington, D.C. Dulles Intl or Billings Logan Intl - Washington, D.C. Dulles Intl, Bozeman Gallatin 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 $453, our data shows the cheapest flight currently is $220. When looking at the most popular route, (Bozeman Gallatin Field - Washington, D.C. Dulles Intl), you can expect to pay $194 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, August is the cheapest month in which you can book a flight from Montana to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Montana to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Gaithersburg
Fredericksburg
Linthicum Heights
Fairfax
Falls Church
Owings Mills
Manassas
Rockville
Hanover
Oxon Hill
Laurel
Towson
National Harbor
Dundalk

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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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San Francisco to Dulles Intl flights
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O'Hare Intl to Baltimore flights
Atlanta to Reagan-National flights
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Minneapolis to Reagan-National flights
Hobby to Baltimore flights
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Tampa to Reagan-National flights
Midway to Baltimore flights
Detroit to Reagan-National flights
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Orlando to Reagan-National flights
San Diego to Dulles Intl flights
Denver to Baltimore flights
Orlando to Baltimore flights
Sky Harbor Intl to Dulles Intl flights
Miami to Reagan-National flights
Fort Lauderdale to Baltimore flights
Denver to Dulles Intl flights
Salt Lake City to Dulles Intl flights
Tampa to Baltimore flights
Ontario to Dulles Intl flights
George Bush Intcntl to Baltimore flights
San Diego 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$220Average$308FlexibilityNo cancel feeOn-time63%
DeltaCheapest$231Average$430FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$312Average$545FlexibilityNo cancel feeOn-time69%

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