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Dulles Intl

$103+ 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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — IAD
Mar 7 — Mar 141
Sat 3/7
Sat 3/14
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 February 5, 2026.

This Delta deal was found by Cheapflights users on 2/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/142:49 pm
FCA
-
IAD
1 stop6h 43m
Delta
Sat 4/186:00 am
IAD
-
FCA
1 stop9h 19m
Delta
Deal found 2/5$237
This Delta deal was found by Cheapflights users on 2/3. 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 4/212:49 pm
FCA
-
IAD
1 stop6h 43m
Delta
Sun 4/266:00 am
IAD
-
FCA
1 stop9h 54m
Delta
Deal found 2/3$259
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 10/276:33 am
FCA
-
IAD
1 stop8h 43m
Alaska Airlines
Sat 10/316:30 am
IAD
-
FCA
1 stop11h 05m
Alaska Airlines
Deal found 2/2$269
This Delta deal was found by Cheapflights users on 2/4. 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 3/56:00 am
BZN
-
IAD
1 stop5h 34m
Delta
Sun 3/87:00 am
IAD
-
BZN
1 stop9h 35m
Delta
Deal found 2/4$283
This Delta deal was found by Cheapflights users on 2/3. 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 3/185:58 am
BZN
-
IAD
1 stop5h 34m
Delta
Tue 3/247:00 am
IAD
-
BZN
1 stop9h 36m
Delta
Deal found 2/3$289
This American Airlines deal was found by Cheapflights users on 2/5. 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.
Thu 3/51:47 pm
BZN
-
IAD
1 stop7h 06m
American Airlines
Thu 3/129:19 am
IAD
-
BZN
2 stops14h 19m
American Airlines
Deal found 2/5$294
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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 3/107:00 am
BZN
-
IAD
1 stop8h 20m
Alaska Airlines
Fri 3/136:20 pm
IAD
-
BZN
2 stops21h 48m
Alaska Airlines
Deal found 2/3$295
This Delta deal was found by Cheapflights users on 2/2. 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 3/195:58 am
BZN
-
IAD
1 stop5h 34m
Delta
Mon 3/237:59 pm
IAD
-
BZN
2 stops20h 37m
Delta
Deal found 2/2$297
This Delta deal was found by Cheapflights users on 2/3. 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 3/52:00 pm
BZN
-
IAD
1 stop7h 55m
Delta
Thu 3/127:00 am
IAD
-
BZN
1 stop9h 35m
Delta
Deal found 2/3$298
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/198:00 am
BZN
-
IAD
1 stop7h 30m
United Airlines
Mon 3/236:15 am
IAD
-
BZN
1 stop7h 25m
United Airlines
Deal found 2/3$307
This American Airlines deal was found by Cheapflights users on 2/3. 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 3/51:47 pm
BZN
-
IAD
1 stop7h 06m
American Airlines
Sun 3/86:00 am
IAD
-
BZN
1 stop10h 46m
American Airlines
Deal found 2/3$309
This Delta deal was found by Cheapflights users on 2/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:20 am
BIL
-
IAD
1 stop5h 14m
Delta
Tue 3/32:17 pm
IAD
-
BIL
1 stop7h 22m
Delta
Deal found 2/5$309

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 February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$237
(Delta)

One-way from

$103
(American Airlines)

Popular in

August

Cheapest in

September

Average price

$358

Good round-trip deal

$657 or less

Good one-way deal

$245 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. 6% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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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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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 February 5, 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

Montana

Fly to

Dulles Intl

Route

Depart

Return

Price

KalispellWashington, D.C.

FCA - IAD

FCAIAD

Kalispell Glacier Park

Tue 4/14

2:49 pm-11:32 pm

1 stop6h 43m

Washington, D.C. Dulles Intl

Sat 4/18

6:00 am-1:19 pm

1 stop9h 19m

$237

KalispellWashington, D.C.

FCA - IAD

FCAIAD

Kalispell Glacier Park

Tue 4/21

2:49 pm-11:32 pm

1 stop6h 43m

Washington, D.C. Dulles Intl

Mon 4/27

6:00 am-1:54 pm

1 stop9h 54m

$249

KalispellWashington, D.C.

FCA - IAD

FCAIAD

Kalispell Glacier Park

Tue 4/21

2:49 pm-11:32 pm

1 stop6h 43m

Washington, D.C. Dulles Intl

Sun 4/26

6:00 am-1:54 pm

1 stop9h 54m

$259

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Thu 3/5

6:00 am-1:34 pm

1 stop5h 34m

Washington, D.C. Dulles Intl

Sun 3/8

7:00 am-2:35 pm

1 stop9h 35m

$283

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Wed 3/18

5:58 am-1:32 pm

1 stop5h 34m

Washington, D.C. Dulles Intl

Tue 3/24

7:00 am-2:36 pm

1 stop9h 36m

$289

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Wed 3/18

5:58 am-1:32 pm

1 stop5h 34m

Washington, D.C. Dulles Intl

Mon 3/23

7:18 am-8:14 pm

2 stops14h 56m

$294

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Tue 3/10

7:00 am-5:20 pm

1 stop8h 20m

Washington, D.C. Dulles Intl

Fri 3/13

6:20 pm-2:08 pm

2 stops21h 48m

$295

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Thu 3/5

2:00 pm-11:55 pm

1 stop7h 55m

Washington, D.C. Dulles Intl

Thu 3/12

7:00 am-2:35 pm

1 stop9h 35m

$298

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Thu 3/19

8:00 am-5:30 pm

1 stop7h 30m

Washington, D.C. Dulles Intl

Mon 3/23

6:15 am-11:40 am

1 stop7h 25m

$307

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Thu 2/26

6:20 am-1:34 pm

1 stop5h 14m

Washington, D.C. Dulles Intl

Tue 3/3

2:17 pm-7:39 pm

1 stop7h 22m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

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, June is the cheapest month in which you can book a flight from Montana to Washington, D.C. Dulles Intl Airport (average of $218). Flying from Montana to Washington, D.C. Dulles Intl Airport in May is currently the most expensive (average of $388). 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 February 5, 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?

    Delta, Alaska Airlines, and United Airlines can get you from Montana to Washington, D.C. Dulles Intl Airport in just under 6h 43m. Your travel time can differ by up to 2h 15m. 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 $144 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 Missoula Johnson-Bell Field - Washington, D.C. Dulles Intl or Bozeman Gallatin 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 $718, our data shows the cheapest flight currently is $148. When looking at the most popular route, (Billings Logan Intl - Washington, D.C. Dulles Intl), you can expect to pay $359 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, June is the cheapest month in which you can book a flight from Montana to Washington, D.C. Dulles Intl Airport (average of $218). Flying from Montana to Washington, D.C. Dulles Intl Airport in May is currently the most expensive (average of $388). 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
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Upper Marlboro
Manassas
Largo
Bowie
McLean
Clinton

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.
Dallas/Fort Worth to Dulles Intl flights
Boston to Baltimore flights
Los Angeles to Reagan-National flights
Boston to Dulles Intl flights
Dallas/Fort Worth to Baltimore flights
Dallas/Fort Worth to Reagan-National flights
Hobby to Reagan-National flights
Atlanta to Baltimore flights
Los Angeles to Baltimore flights
Boston to Reagan-National flights
O'Hare Intl to Dulles Intl flights
Atlanta to Dulles Intl flights
O'Hare Intl to Reagan-National flights
Seattle to Reagan-National flights
Los Angeles to Dulles Intl flights
O'Hare Intl to Baltimore flights
Orlando to Dulles Intl flights
San Francisco to Reagan-National flights
Atlanta to Reagan-National flights
Seattle to Dulles Intl flights
San Francisco to Dulles Intl flights
San Francisco to Baltimore flights
Fort Lauderdale to Dulles Intl flights
Hobby to Dulles Intl flights
George Bush Intcntl to Reagan-National flights
Miami to Dulles Intl flights
Denver to Baltimore flights
Tampa to Dulles Intl flights
Hobby to Baltimore flights
George Bush Intcntl to Dulles Intl flights
Orlando to Baltimore flights
Detroit to Dulles Intl flights
Austin to Dulles Intl flights
Orlando to Reagan-National flights
Denver to Dulles Intl flights
Fort Lauderdale to Baltimore flights
Denver to Reagan-National flights
Detroit to Baltimore flights
LaGuardia to Reagan-National flights
Tampa to Reagan-National flights
Seattle to Baltimore flights
Sky Harbor Intl to Dulles Intl flights
Newark to Dulles Intl flights
Minneapolis to Reagan-National flights
Miami to Baltimore flights
Austin to Reagan-National flights
Detroit to Reagan-National flights
Charlotte to Baltimore flights
Ontario to Dulles Intl flights
Minneapolis to Dulles Intl 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 February 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$220Average$288FlexibilityNo cancel feeOn-time63%
DeltaCheapest$231Average$368FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$239Average$580FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$385Average$495FlexibilityNo cancel feeOn-time75%

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