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Dulles Intl

$144+ 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
May 5 — May 121
Tue 5/5
Tue 5/12
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 April 5, 2026.

This Delta deal was found by Cheapflights users on 4/1. 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 4/302:49 pm
FCA
-
IAD
1 stop6h 43m
Delta
Tue 5/56:00 am
IAD
-
FCA
1 stop9h 54m
Delta
Deal found 4/1$237
This Delta deal was found by Cheapflights users on 3/31. 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 5/71:03 pm
HLN
-
IAD
1 stop8h 29m
Delta
Tue 5/127:30 am
IAD
-
HLN
1 stop6h 53m
Delta
Deal found 3/31$273
This Trip.com deal was found by Cheapflights users on 4/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/276:15 pm
GTF
-
IAD
1 stop9h 35m
Alaska Airlines
Wed 5/69:00 am
IAD
-
GTF
1 stop10h 35m
Alaska Airlines
Deal found 4/1$305
This United Airlines deal was found by Cheapflights users on 4/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:30 am
FCA
-
IAD
1 stop6h 43m
United Airlines
Tue 10/274:08 pm
IAD
-
FCA
1 stop7h 22m
United Airlines
Deal found 4/2$309
This Delta deal was found by Cheapflights users on 3/31. 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 5/293:30 pm
MSO
-
IAD
1 stop6h 09m
Delta
Mon 6/16:58 pm
IAD
-
MSO
1 stop6h 42m
Delta
Deal found 3/31$320
This Delta deal was found by Cheapflights users on 4/1. 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.
Mon 4/276:20 pm
GTF
-
IAD
2 stops12h 55m
Delta
Wed 5/66:00 am
IAD
-
GTF
2 stops13h 40m
Delta
Deal found 4/1$321
This United Airlines deal was found by Cheapflights users on 4/1. 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 5/2310:20 am
BZN
-
IAD
Nonstop4h 08m
United Airlines
Sat 5/305:38 pm
IAD
-
BZN
1 stop7h 00m
United Airlines
Deal found 4/1$339
This Expedia deal was found by Cheapflights users on 4/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/204:55 pm
GTF
-
IAD
1 stop12h 33m
Alaska Airlines
Sat 10/246:30 am
IAD
-
GTF
1 stop11h 43m
Alaska Airlines
Deal found 4/4$342
This United Airlines deal was found by Cheapflights users on 3/31. 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 5/65:05 am
BIL
-
IAD
1 stop6h 16m
United Airlines
Wed 5/273:56 pm
IAD
-
BIL
1 stop7h 21m
United Airlines
Deal found 3/31$343
This Delta deal was found by Cheapflights users on 3/31. 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 5/283:30 pm
MSO
-
IAD
1 stop6h 09m
Delta
Mon 6/16:58 pm
IAD
-
MSO
1 stop6h 42m
Delta
Deal found 3/31$348
This Alaska Airlines deal was found by Cheapflights users on 4/2. 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.
Mon 4/273:49 pm
BZN
-
IAD
1 stop12h 01m
Alaska Airlines
Thu 4/307:10 am
IAD
-
BZN
1 stop9h 45m
Alaska Airlines
Deal found 4/2$349
This Alaska Airlines deal was found by Cheapflights users on 4/3. 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.
Fri 11/136:33 am
FCA
-
IAD
1 stop7h 53m
Alaska Airlines
Tue 11/179:00 am
IAD
-
FCA
1 stop8h 35m
Alaska Airlines
Deal found 4/3$349

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 April 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$237
(Delta)

One-way from

$144
(Delta)

Popular in

March

Cheapest in

January

Average price

$470

Good one-way deal

$279 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. 15% potential increase in price ($71 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a one-way flight from Montana to Washington, D.C. Dulles Intl.
Search Deals

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 April 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KalispellWashington, D.C.

FCA - IAD

FCAIAD

Kalispell Glacier Park

Thu 4/30

2:49 pm-11:32 pm

1 stop6h 43m

Washington, D.C. Dulles Intl

Tue 5/5

6:00 am-1:54 pm

1 stop9h 54m

$298
Quickest round-trip

KalispellWashington, D.C.

FCA - IAD

FCAIAD

Kalispell Glacier Park

Thu 6/4

2:30 pm-11:39 pm

1 stop7h 09m

Washington, D.C. Dulles Intl

Mon 6/8

6:55 pm-11:38 pm

1 stop6h 43m

$334

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Wed 6/3

1:00 pm-11:32 pm

1 stop8h 32m

Washington, D.C. Dulles Intl

Mon 6/8

6:55 pm-11:58 pm

1 stop7h 03m

$349

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Thu 6/11

3:53 pm-11:20 pm

1 stop5h 27m

Washington, D.C. Dulles Intl

Tue 6/16

5:21 pm-12:23 am

2 stops9h 02m

$354

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Fri 4/24

6:15 pm-5:50 am

1 stop9h 35m

Washington, D.C. Dulles Intl

Tue 4/28

7:10 am-5:35 pm

1 stop12h 25m

$367

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Sat 5/23

2:25 pm-11:32 pm

1 stop7h 07m

Washington, D.C. Dulles Intl

Sat 5/30

3:39 pm-10:15 pm

1 stop8h 36m

$369

BillingsWashington, D.C.

BIL - IAD

BILIAD

Billings Logan Intl

Thu 4/30

2:30 pm-11:34 pm

1 stop7h 04m

Washington, D.C. Dulles Intl

Tue 5/12

5:20 pm-10:45 pm

1 stop7h 25m

$396

KalispellWashington, D.C.

FCA - IAD

FCAIAD

Kalispell Glacier Park

Fri 5/22

2:33 pm-12:45 am

1 stop8h 12m

Washington, D.C. Dulles Intl

Mon 5/25

6:10 am-11:29 am

1 stop7h 19m

$409

BozemanWashington, D.C.

BZN - IAD

BZNIAD

Bozeman Gallatin Field

Wed 6/10

3:53 pm-11:20 pm

1 stop5h 27m

Washington, D.C. Dulles Intl

Tue 6/16

5:21 pm-11:58 pm

2 stops8h 37m

$409

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Thu 5/7

6:22 pm-5:50 am

1 stop9h 28m

Washington, D.C. Dulles Intl

Tue 5/12

7:10 am-5:45 pm

1 stop12h 35m

$412

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

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 $702). 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 April 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.

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 52m. 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 Bozeman Gallatin Field - Washington, D.C. Dulles Intl or Kalispell Glacier Park - 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 $460, our data shows the cheapest flight currently is $152. When looking at the most popular route, (Billings Logan Intl - Washington, D.C. Dulles Intl), you can expect to pay $364 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 $702). 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
Owings Mills
Springfield
Arlington
Silver Spring
Herndon
Hyattsville
Hanover
Laurel
Rockville
Upper Marlboro
Largo
Bowie
Clinton
Towson
Cordova
Manassas
Falls Church

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.
Los Angeles to Dulles Intl flights
Dallas/Fort Worth to Dulles Intl flights
Los Angeles to Reagan-National flights
Atlanta to Dulles Intl flights
Dallas/Fort Worth to Baltimore flights
Los Angeles to Baltimore flights
Seattle to Dulles Intl flights
San Francisco to Dulles Intl flights
Boston to Dulles Intl flights
Atlanta to Reagan-National flights
Boston to Reagan-National flights
Minneapolis to Reagan-National flights
Seattle to Reagan-National flights
San Francisco to Reagan-National flights
Denver to Dulles Intl flights
Atlanta to Baltimore flights
Hobby to Dulles Intl flights
O'Hare Intl to Baltimore flights
O'Hare Intl to Dulles Intl flights
Minneapolis to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Boston to Baltimore flights
Denver to Baltimore flights
San Francisco to Baltimore flights
Hobby to Baltimore flights
Orlando to Dulles Intl flights
Hobby to Reagan-National flights
O'Hare Intl to Reagan-National flights
George Bush Intcntl to Dulles Intl flights
Tampa to Dulles Intl flights
Orlando to Reagan-National flights
Seattle to Baltimore flights
George Bush Intcntl to Reagan-National flights
Fort Lauderdale to Dulles Intl flights
LaGuardia to Reagan-National flights
Tampa to Baltimore flights
Minneapolis to Baltimore flights
Miami to Reagan-National flights
Orlando to Baltimore flights
Fort Lauderdale to Baltimore flights
George Bush Intcntl to Baltimore flights
Ontario to Dulles Intl flights
San Diego to Dulles Intl flights
Sky Harbor Intl to Dulles Intl flights
Tampa to Reagan-National flights
Denver to Reagan-National flights
Miami to Baltimore flights
Austin to Dulles Intl flights
Detroit to Baltimore flights
Detroit to Dulles Intl 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 April 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$241Average$288FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$256Average$578FlexibilityNo cancel feeOn-time69%
DeltaCheapest$277Average$489FlexibilityNo cancel feeOn-timeN/A

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