How long does it take to fly to Washington, D.C. Dulles Intl Airport?

Flight times from Montana to Washington, D.C. Dulles Intl Airport vary, but if you’re flying out of Bozeman and flying into Washington, D.C. Dulles Intl Airport (one of the most popular routes), then the duration is 5h 48m on average. Another popular route from Montana to Washington, D.C. Dulles Intl Airport is flying from Great Falls to Washington, D.C. Dulles Intl Airport, which will take roughly 6h 30m. Keep in mind that layovers or delays could extend your travel time.

What is the cheapest airline that flies from Montana to Washington, D.C. Dulles Intl?

Alaska Airlines, United Airlines, and American Airlines are the most popular carriers operating from Montana to Washington, D.C. Dulles Intl

When did momondo last update prices for flights from Montana to Washington, D.C. Dulles Intl Airport?

Prices for flights from Montana to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Montana to Washington, D.C. Dulles Intl Airport?

As of September 2026, there are 2 operators available to choose from for flights from Montana to Washington, D.C. Dulles Intl Airport.

How old do you have to be to fly from Montana to Washington, D.C. Dulles Intl Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Montana to Washington, D.C. Dulles Intl Airport.

What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

The travel and health documents you'll need for your trip to Washington, D.C. Dulles Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$162 Cheap Flights from Montana to Washington, D.C. Dulles Intl Airport in 2026/27

Q: How many flights depart from Montana to Washington, D.C. Dulles Intl Airport on average per week?

As of September 2026, there are 3 flights per week flying from Montana to Washington, D.C. Dulles Intl Airport. The most common day of the week flights depart is Sat, with 67% of flights taking off on this day.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Montana to Washington, D.C.

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:45 pm - 11:15 pmGTF Great Falls-IAD Washington, D.C. Dulles Intl

6h 30m1 stop Denver Intl

2:05 pm - 9:38 pmIAD Washington, D.C. Dulles Intl-GTF Great Falls

9h 33m1 stop Denver Intl

$368United Airlines

Sun, Nov 1 - Wed, Nov 11

1:18 pm - 11:35 pmGTF Great Falls-IAD Washington, D.C. Dulles Intl

8h 17m1 stop Salt Lake City

12:30 pm - 10:40 pmIAD Washington, D.C. Dulles Intl-GTF Great Falls

12h 10m2 stops New York John F Kennedy Intl Salt Lake City

$374Delta

Fri, Oct 30 - Wed, Nov 4

2:28 pm - 11:25 pmBIL Billings Logan Intl-IAD Washington, D.C. Dulles Intl

6h 57m1 stop Denver Intl

4:12 pm - 9:10 pmIAD Washington, D.C. Dulles Intl-BIL Billings Logan Intl

6h 58m1 stop Denver Intl

$379United Airlines

Sat, Oct 17 - Sat, Oct 24

3:00 pm - 8:47 pmBZN Bozeman Gallatin Field-IAD Washington, D.C. Dulles Intl

3h 47mnonstop

8:40 am - 11:35 amIAD Washington, D.C. Dulles Intl-BZN Bozeman Gallatin Field

4h 55mnonstop

$379United Airlines

Sat, Dec 19 - Sat, Jan 2

1:08 pm - 11:35 pmHLN Helena-IAD Washington, D.C. Dulles Intl

8h 27m1 stop Salt Lake City

6:13 am - 12:28 pmIAD Washington, D.C. Dulles Intl-HLN Helena

8h 15m1 stop Salt Lake City

$379Delta

Tue, Oct 20 - Fri, Oct 30

1:08 pm - 11:35 pmHLN Helena-IAD Washington, D.C. Dulles Intl

8h 27m1 stop Salt Lake City

7:00 am - 12:27 pmIAD Washington, D.C. Dulles Intl-HLN Helena

7h 27m1 stop Salt Lake City

$379Delta

Fri, Oct 30 - Tue, Nov 10

4:15 pm - 12:38 amBZN Bozeman Gallatin Field-IAD Washington, D.C. Dulles Intl

6h 23m1 stop Chicago O'Hare Intl

8:40 am - 11:35 amIAD Washington, D.C. Dulles Intl-BZN Bozeman Gallatin Field

4h 55mnonstop

$385United Airlines

Sat, Dec 19 - Sat, Jan 2

2:06 pm - 11:59 pmMSO Missoula Johnson-Bell Field-IAD Washington, D.C. Dulles Intl

7h 53m1 stop Seattle/Tacoma Intl

9:38 am - 10:54 pmIAD Washington, D.C. Dulles Intl-MSO Missoula Johnson-Bell Field

15h 16m1 stop Seattle/Tacoma Intl

$399Alaska Airlines

Tue, Oct 27 - Wed, Oct 28

2:02 pm - 5:44 amMSO Missoula Johnson-Bell Field-IAD Washington, D.C. Dulles Intl

13h 42m1 stop Seattle/Tacoma Intl

5:17 pm - 12:22 pmIAD Washington, D.C. Dulles Intl-MSO Missoula Johnson-Bell Field

21h 05m1 stop Seattle/Tacoma Intl

$409Alaska Airlines

Tue, Nov 17 - Wed, Nov 18

2:06 pm - 11:59 pmMSO Missoula Johnson-Bell Field-IAD Washington, D.C. Dulles Intl

7h 53m1 stop Seattle/Tacoma Intl

7:46 am - 3:31 pmIAD Washington, D.C. Dulles Intl-MSO Missoula Johnson-Bell Field

9h 45m1 stop Seattle/Tacoma Intl

$419Alaska Airlines

Sat, Oct 24 - Sat, Nov 7

Cheap last minute flights

Enter your travel dates to find the best prices.

6:21 pm - 11:45 amGTF Great Falls-IAD Washington, D.C. Dulles Intl

15h 24m2 stops Salt Lake City New York John F Kennedy Intl

12:25 pm - 10:37 pmIAD Washington, D.C. Dulles Intl-GTF Great Falls

12h 12m2 stops New York John F Kennedy Intl Salt Lake City

$494Delta

Tue, Sep 22 - Tue, Sep 29

7:00 am - 4:43 pmMSO Missoula Johnson-Bell Field-IAD Washington, D.C. Dulles Intl

7h 43m1 stop Seattle/Tacoma Intl

7:02 am - 2:50 pmIAD Washington, D.C. Dulles Intl-MSO Missoula Johnson-Bell Field

9h 48m1 stop Seattle/Tacoma Intl

$504Alaska Airlines

Sat, Sep 26 - Wed, Oct 7

7:00 am - 6:50 pmMSO Missoula Johnson-Bell Field-IAD Washington, D.C. Dulles Intl

9h 50m1 stop Los Angeles Los Angeles

6:10 am - 11:24 amIAD Washington, D.C. Dulles Intl-MSO Missoula Johnson-Bell Field

7h 14m1 stop Chicago O'Hare Intl

$504United Airlines

Wed, Sep 23 - Wed, Sep 30

7:00 am - 4:43 pmMSO Missoula Johnson-Bell Field-IAD Washington, D.C. Dulles Intl

7h 43m1 stop Seattle/Tacoma Intl

7:02 am - 2:50 pmIAD Washington, D.C. Dulles Intl-MSO Missoula Johnson-Bell Field

9h 48m1 stop Seattle/Tacoma Intl

$504Alaska Airlines

Sat, Sep 26 - Sat, Oct 3

7:00 am - 4:43 pmMSO Missoula Johnson-Bell Field-IAD Washington, D.C. Dulles Intl

7h 43m1 stop Seattle/Tacoma Intl

7:02 am - 2:50 pmIAD Washington, D.C. Dulles Intl-MSO Missoula Johnson-Bell Field

9h 48m1 stop Seattle/Tacoma Intl

$504Alaska Airlines

Sat, Sep 26 - Tue, Oct 6

6:00 am - 1:31 pmMSO Missoula Johnson-Bell Field-IAD Washington, D.C. Dulles Intl

5h 31m1 stop Minneapolis St Paul

5:15 pm - 11:42 pmIAD Washington, D.C. Dulles Intl-MSO Missoula Johnson-Bell Field

8h 27m2 stops Detroit Metropolitan Wayne County Minneapolis St Paul

$509Delta

Sat, Sep 26 - Sat, Oct 3

1:15 pm - 11:43 pmGTF Great Falls-IAD Washington, D.C. Dulles Intl

8h 28m1 stop Salt Lake City

12:25 pm - 10:37 pmIAD Washington, D.C. Dulles Intl-GTF Great Falls

12h 12m2 stops New York John F Kennedy Intl Salt Lake City

$520Delta

Tue, Sep 22 - Tue, Sep 29

6:21 pm - 11:45 amGTF Great Falls-IAD Washington, D.C. Dulles Intl

15h 24m2 stops Salt Lake City New York John F Kennedy Intl

12:25 pm - 10:37 pmIAD Washington, D.C. Dulles Intl-GTF Great Falls

12h 12m2 stops New York John F Kennedy Intl Salt Lake City

$529Delta

Mon, Sep 21 - Tue, Sep 29

2:38 pm - 11:25 pmMSO Missoula Johnson-Bell Field-IAD Washington, D.C. Dulles Intl

6h 47m1 stop Denver Intl

6:10 am - 11:32 amIAD Washington, D.C. Dulles Intl-MSO Missoula Johnson-Bell Field

7h 22m1 stop Chicago O'Hare Intl

$624United Airlines

Sat, Sep 26 - Thu, Oct 8

2:37 pm - 11:25 pmBZN Bozeman Gallatin Field-IAD Washington, D.C. Dulles Intl

6h 48m1 stop Denver Intl

10:10 am - 3:28 pmIAD Washington, D.C. Dulles Intl-BZN Bozeman Gallatin Field

7h 18m1 stop Denver Intl

$654United Airlines

Fri, Sep 25 - Sun, Sep 27

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United Airlines flights from Montana to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Montana to Washington, D.C. Dulles Intl Airport flight tickets

United Airlines

Nov 1

GTF2:45 pmGreat Falls

6h 30m

1 stop

IAD11:15 pmWashington, D.C. Dulles Intl

Nov 8

IAD6:10 amWashington, D.C. Dulles Intl

9h 39m

1 stop

GTF1:49 pmGreat Falls

$368

United Airlines

Dec 19

BZN3:00 pmBozeman Gallatin Field

3h 47m

IAD8:47 pmWashington, D.C. Dulles Intl

Jan 2

IAD8:40 amWashington, D.C. Dulles Intl

4h 55m

BZN11:35 amBozeman Gallatin Field

$379

United Airlines

Dec 19

BZN4:15 pmBozeman Gallatin Field

6h 23m

1 stop

IAD12:38 amWashington, D.C. Dulles Intl

Jan 2

IAD8:40 amWashington, D.C. Dulles Intl

4h 55m

BZN11:35 amBozeman Gallatin Field

$385

Delta flights from Montana to Washington, D.C. Dulles Intl Airport

Our best Delta deals on Montana to Washington, D.C. Dulles Intl Airport flight tickets

Delta

Oct 20

HLN1:08 pmHelena

8h 27m

1 stop

IAD11:35 pmWashington, D.C. Dulles Intl

Oct 30

IAD6:13 amWashington, D.C. Dulles Intl

8h 15m

1 stop

HLN12:28 pmHelena

$379

Delta

Oct 20

HLN1:08 pmHelena

8h 27m

1 stop

IAD11:35 pmWashington, D.C. Dulles Intl

Oct 30

IAD6:05 amWashington, D.C. Dulles Intl

8h 23m

2 stops

HLN12:28 pmHelena

$384

Delta

Oct 30

HLN7:15 amHelena

9h 04m

2 stops

IAD6:19 pmWashington, D.C. Dulles Intl

Nov 10

IAD12:35 pmWashington, D.C. Dulles Intl

11h 51m

2 stops

HLN10:26 pmHelena

$389

momondo Fare Finder

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

Great FallsWashington, D.C.

GTF Great Falls - IAD Washington, D.C. Dulles Intl

GTFIAD

Great Falls

Sun 11/1

2:45 pm-11:15 pm

1 stop6h 30m

Washington, D.C. Dulles Intl

Wed 11/11

2:05 pm-9:38 pm

1 stop9h 33m

$368

Great FallsWashington, D.C.

GTF Great Falls - IAD Washington, D.C. Dulles Intl

GTFIAD

Great Falls

Fri 10/30

1:18 pm-11:35 pm

1 stop8h 17m

Washington, D.C. Dulles Intl

Wed 11/4

12:30 pm-10:40 pm

2 stops12h 10m

$374

BillingsWashington, D.C.

BIL Billings Logan Intl - IAD Washington, D.C. Dulles Intl

BILIAD

Billings Logan Intl

Sat 10/17

2:28 pm-11:25 pm

1 stop6h 57m

Washington, D.C. Dulles Intl

Sat 10/24

4:12 pm-9:10 pm

1 stop6h 58m

$379

Quickest round-trip

BozemanWashington, D.C.

BZN Bozeman Gallatin Field - IAD Washington, D.C. Dulles Intl

BZNIAD

Bozeman Gallatin Field

Sat 12/19

3:00 pm-8:47 pm

Nonstop3h 47m

Washington, D.C. Dulles Intl

Sat 1/2

8:40 am-11:35 am

Nonstop4h 55m

$379

HelenaWashington, D.C.

HLN Helena - IAD Washington, D.C. Dulles Intl

HLNIAD

Helena

Tue 10/20

1:08 pm-11:35 pm

1 stop8h 27m

Washington, D.C. Dulles Intl

Fri 10/30

6:13 am-12:28 pm

1 stop8h 15m

$379

HelenaWashington, D.C.

HLN Helena - IAD Washington, D.C. Dulles Intl

HLNIAD

Helena

Fri 10/30

1:08 pm-11:35 pm

1 stop8h 27m

Washington, D.C. Dulles Intl

Tue 11/10

7:00 am-12:27 pm

1 stop7h 27m

$379

BozemanWashington, D.C.

BZN Bozeman Gallatin Field - IAD Washington, D.C. Dulles Intl

BZNIAD

Bozeman Gallatin Field

Sat 12/19

4:15 pm-12:38 am

1 stop6h 23m

Washington, D.C. Dulles Intl

Sat 1/2

8:40 am-11:35 am

Nonstop4h 55m

$385

MissoulaWashington, D.C.

MSO Missoula Johnson-Bell Field - IAD Washington, D.C. Dulles Intl

MSOIAD

Missoula Johnson-Bell Field

Tue 10/27

2:06 pm-11:59 pm

1 stop7h 53m

Washington, D.C. Dulles Intl

Wed 10/28

9:38 am-10:54 pm

1 stop15h 16m

$399

MissoulaWashington, D.C.

MSO Missoula Johnson-Bell Field - IAD Washington, D.C. Dulles Intl

MSOIAD

Missoula Johnson-Bell Field

Tue 11/17

2:02 pm-5:44 am

1 stop13h 42m

Washington, D.C. Dulles Intl

Wed 11/18

5:17 pm-12:22 pm

1 stop21h 05m

$409

MissoulaWashington, D.C.

MSO Missoula Johnson-Bell Field - IAD Washington, D.C. Dulles Intl

MSOIAD

Missoula Johnson-Bell Field

Sat 10/24

2:06 pm-11:59 pm

1 stop7h 53m

Washington, D.C. Dulles Intl

Sat 11/7

7:46 am-3:31 pm

1 stop9h 45m

$419

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Montana to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, November is the cheapest month to fly from Montana to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $366. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of November, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $378.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Saturday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $649. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Montana to Washington, D.C. Dulles Intl Airport for around $1,380.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Montana at noon is the least expensive time of day to depart. momondo users have found prices as low as $649 when looking at flights departing at noon. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $784 on average. Flights to Washington, D.C. Dulles Intl Airport from Montana in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Montana to Washington, D.C. Dulles Intl flight route?

Fly from Bozeman Gallatin Field to Washington, D.C. Dulles Intl for the best Montana - Washington, D.C. Dulles Intl flight prices

What cabin class options are available on Montana to Washington, D.C. Dulles Intl Airport flights?

There is only 1 cabin class available to choose from on Montana to Washington, D.C. Dulles Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Montana to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 9% on your flight if you consider stops on a Montana to Washington, D.C. Dulles Intl Airport flight.

Cheap Montana to Washington, D.C. Dulles Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montana to Washington, D.C. Dulles Intl Airport

Best Price Found	$162
Fastest flight time	5h 48m
Direct flights	Sun

The best one-way flight to Washington, D.C. Dulles Intl Airport from Montana in the past 72 hours is $162. The best round-trip flight deal from Montana to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $368.

The fastest flight from Montana to Washington, D.C. Dulles Intl Airport takes 5h 48m

Direct flights go from Montana to Washington, D.C. Dulles Intl Airport on Sunday. There are no airlines offering direct flights.

Search flight deals

Frequently asked questions about flying from Montana to Washington, D.C. Dulles Intl Airport

When did momondo last update prices for flights from Montana to Washington, D.C. Dulles Intl Airport?
Prices for flights from Montana to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Montana to Washington, D.C. Dulles Intl Airport?
As of September 2026, there are 2 operators available to choose from for flights from Montana to Washington, D.C. Dulles Intl Airport.
How old do you have to be to fly from Montana to Washington, D.C. Dulles Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Montana to Washington, D.C. Dulles Intl Airport.
What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?
The travel and health documents you'll need for your trip to Washington, D.C. Dulles Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Montana to Washington, D.C. Dulles Intl Airport?
momondo data reveals that the most frequently booked plane model on the route from Montana to Washington, D.C. Dulles Intl Airport is Boeing 737 MAX 8, representing 30.00% of all bookings. The subsequent popular models are Boeing 737-800 at 30.00%, Airbus A319 at 20.00%, and Boeing 757 at 10.00%.

Best airlines flying from Montana to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Montana to Washington, D.C. Dulles Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $256	Free Cancellation	Rating 7.4 10,230 reviews		Search United Airlines flights
Alaska Airlines	PriceFrom $384	Free Cancellation	Rating 7.9 12,950 reviews		Search Alaska Airlines flights

Alexandria

National Harbor

Arlington

Gettysburg

Winchester

Fredericksburg

Waldorf

Laurel

Woodbridge

Linthicum Heights

Gaithersburg

Rockville

Silver Spring

Towson

Sterling

Fairfax

Springfield

Glen Burnie

Edgewood

Martinsburg

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All flight searches from Montana to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

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Cheap flights from Montana to Washington, D.C. from $162

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montana to Washington, D.C. departing on 11/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Montana to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Montana to Washington, D.C. Dulles Intl Airport flight tickets

Delta flights from Montana to Washington, D.C. Dulles Intl Airport

Our best Delta deals on Montana to Washington, D.C. Dulles Intl Airport flight tickets

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Use the filters below to find and compare flights from Montana to Washington, D.C. Dulles Intl Airport that are best for you.

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Montana to Washington, D.C. Dulles Intl Airport

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

What is the cheapest Montana to Washington, D.C. Dulles Intl flight route?

What cabin class options are available on Montana to Washington, D.C. Dulles Intl Airport flights?

Can stopping save me money on Montana to Washington, D.C. Dulles Intl Airport flights?

What is the cheapest airline that flies from Montana to Washington, D.C. Dulles Intl?

How many flights depart from Montana to Washington, D.C. Dulles Intl Airport on average per week?

How long does it take to fly to Washington, D.C. Dulles Intl Airport?

Cheap Montana to Washington, D.C. Dulles Intl Airport flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Montana to Washington, D.C. Dulles Intl Airport

Best airlines flying from Montana to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Montana to Washington, D.C. Dulles Intl Airport with momondo

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List of cabin classes available on flights landing in Washington, D.C.. Availability may vary depending on flight origin and airline.

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