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Dulles Intl

$155+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — IAD
Jun 25 — Jul 21
Thu 6/25
Thu 7/2
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 May 26, 2026.

This United Airlines deal was found by Cheapflights users on 5/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/64:17 pm
FCA
-
IAD
1 stop6h 27m
United Airlines
Mon 9/76:16 am
IAD
-
FCA
1 stop7h 11m
United Airlines
Deal found 5/22$309
This Delta deal was found by Cheapflights users on 5/25. 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 10/2211:59 am
FCA
-
IAD
2 stops10h 06m
Delta
Tue 10/277:30 am
IAD
-
FCA
1 stop6h 59m
Delta
Deal found 5/25$314
This Delta deal was found by Cheapflights users on 5/25. 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
GTF
-
IAD
1 stop8h 36m
Delta
Sat 10/247:15 am
IAD
-
GTF
1 stop7h 12m
Delta
Deal found 5/25$338
This Alaska Airlines deal was found by Cheapflights users on 5/25. 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 10/277:32 pm
BIL
-
IAD
1 stop8h 08m
Alaska Airlines
Wed 10/289:35 am
IAD
-
BIL
1 stop11h 17m
Alaska Airlines
Deal found 5/25$343
This United Airlines deal was found by Cheapflights users on 5/25. 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 10/222:30 pm
FCA
-
IAD
1 stop6h 49m
United Airlines
Tue 10/272:25 pm
IAD
-
FCA
1 stop9h 05m
United Airlines
Deal found 5/25$344
This Alaska Airlines deal was found by Cheapflights users on 5/25. 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 10/244:48 pm
HLN
-
IAD
1 stop10h 52m
Alaska Airlines
Tue 10/277:00 am
IAD
-
HLN
1 stop11h 11m
Alaska Airlines
Deal found 5/25$349
This American Airlines deal was found by Cheapflights users on 5/24. 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 9/35:52 pm
MSO
-
IAD
1 stop9h 08m
American Airlines
Mon 9/76:11 am
IAD
-
MSO
1 stop8h 24m
American Airlines
Deal found 5/24$349
This Delta deal was found by Cheapflights users on 5/23. 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 7/22:15 pm
BZN
-
IAD
1 stop8h 29m
Delta
Sun 7/56:00 am
IAD
-
BZN
1 stop6h 22m
Delta
Deal found 5/23$349
This Delta deal was found by Cheapflights users on 5/23. 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 9/2412:57 pm
BIL
-
IAD
1 stop8h 25m
Delta
Mon 9/287:00 am
IAD
-
BIL
1 stop7h 17m
Delta
Deal found 5/23$349
This Delta deal was found by Cheapflights users on 5/21. 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 9/33:27 pm
MSO
-
IAD
1 stop6h 02m
Delta
Mon 9/76:00 am
IAD
-
MSO
2 stops8h 33m
Delta
Deal found 5/21$354
This United Airlines deal was found by Cheapflights users on 5/21. 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.
Fri 6/52:33 pm
FCA
-
IAD
1 stop8h 12m
United Airlines
Tue 6/96:10 am
IAD
-
FCA
1 stop7h 19m
United Airlines
Deal found 5/21$379
This Delta deal was found by Cheapflights users on 5/22. 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.
Sat 8/156:26 am
BIL
-
IAD
2 stops11h 38m
Delta
Tue 8/256:56 pm
IAD
-
BIL
1 stop6h 17m
Delta
Deal found 5/22$379

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 May 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$309
(United Airlines)

One-way from

$155
(Delta)

Popular in

May

Cheapest in

January

Average price

$561

Good one-way deal

$303 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. 10% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 26, 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

KalispellWashington, D.C.

FCA - IAD

FCAIAD

Kalispell Glacier Park

Sun 9/6

4:17 pm-12:44 am

1 stop6h 27m

Washington, D.C. Dulles Intl

Mon 9/7

6:16 am-11:27 am

1 stop7h 11m

$309

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 10/20

1:10 pm-11:46 pm

1 stop8h 36m

Washington, D.C. Dulles Intl

Sat 10/24

7:15 am-12:27 pm

1 stop7h 12m

$338

KalispellWashington, D.C.

FCA - IAD

FCAIAD

Kalispell Glacier Park

Thu 10/22

2:30 pm-11:19 pm

1 stop6h 49m

Washington, D.C. Dulles Intl

Tue 10/27

2:25 pm-9:30 pm

1 stop9h 05m

$344

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Sat 10/24

4:48 pm-5:40 am

1 stop10h 52m

Washington, D.C. Dulles Intl

Tue 10/27

7:00 am-4:11 pm

1 stop11h 11m

$349

MissoulaWashington, D.C.

MSO - IAD

MSOIAD

Missoula Johnson-Bell Field

Thu 9/3

3:27 pm-11:29 pm

1 stop6h 02m

Washington, D.C. Dulles Intl

Mon 9/7

6:00 am-12:33 pm

2 stops8h 33m

$354

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Thu 9/24

6:33 pm-9:10 am

2 stops12h 37m

Washington, D.C. Dulles Intl

Mon 9/28

7:00 am-12:17 pm

1 stop7h 17m

$354

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Thu 9/3

11:35 am-11:29 pm

2 stops9h 54m

Washington, D.C. Dulles Intl

Sun 9/6

5:15 pm-10:37 pm

2 stops7h 22m

$359

KalispellWashington, D.C.

FCA - IAD

FCAIAD

Kalispell Glacier Park

Sat 6/6

10:42 am-7:25 pm

1 stop6h 43m

Washington, D.C. Dulles Intl

Wed 6/10

6:10 am-11:29 am

1 stop7h 19m

$379

KalispellWashington, D.C.

FCA - IAD

FCAIAD

Kalispell Glacier Park

Fri 6/5

2:33 pm-12:45 am

1 stop8h 12m

Washington, D.C. Dulles Intl

Tue 6/9

6:10 am-11:29 am

1 stop7h 19m

$379

KalispellWashington, D.C.

FCA - IAD

FCAIAD

Kalispell Glacier Park

Fri 6/5

1:20 pm-11:32 pm

1 stop8h 12m

Washington, D.C. Dulles Intl

Tue 6/9

6:05 am-2:33 pm

2 stops10h 28m

$384

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/25

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 $230). Flying from Montana to Washington, D.C. Dulles Intl Airport in March is currently the most expensive (average of $677). 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 May 26, 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.

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?

    United Airlines, Delta, and Alaska Airlines can get you from Montana to Washington, D.C. Dulles Intl Airport in just under 6h 27m. Your travel time can differ by up to 2h 09m. 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 $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 Billings Logan Intl - Washington, D.C. Dulles Intl or Missoula Johnson-Bell Field - 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 $392, our data shows the cheapest flight currently is $303. When looking at the most popular route, (Bozeman Gallatin Field - 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 $230). Flying from Montana to Washington, D.C. Dulles Intl Airport in March is currently the most expensive (average of $677). 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
Tysons
Owings Mills
Springfield
Arlington
Reston
Herndon
Fredericksburg
Rockville
Hyattsville
Manassas
Hanover
Chantilly
Laurel
Falls Church
Waldorf
Silver Spring
Largo
Clinton
Hunt Valley

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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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Dallas/Fort Worth to Reagan-National flights
Los Angeles to Baltimore flights
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Atlanta to Baltimore flights
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San Francisco to Baltimore flights
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San Francisco to Reagan-National flights
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O'Hare Intl to Baltimore flights
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Boston to Dulles Intl flights
Boston to Reagan-National flights
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Denver to Baltimore flights
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Austin to Dulles Intl flights
Denver to Reagan-National flights
Sky Harbor Intl to Dulles Intl flights
Miami to Reagan-National flights
Detroit to Baltimore flights
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Midway to Dulles Intl flights
Ontario to Baltimore flights
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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 May 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$241Average$355FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$256Average$511FlexibilityNo cancel feeOn-time69%
DeltaCheapest$277Average$496FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$384Average$484FlexibilityNo cancel feeOn-time75%

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