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$149+ Cheap flights from Dulles Intl (IAD) to Great Falls (GTF)

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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — GTF
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
1 adult, Economy
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Cheap flight deals from Dulles Intl to Great Falls

Cheapest flights from Dulles Intl to Great Falls
Explore the most affordable flight options available from Dulles Intl to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.

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.
Sat 5/235:33 pm
IAD
-
GTF
1 stop26h 39m
Alaska Airlines
Sat 5/306:52 pm
GTF
-
IAD
1 stop10h 42m
Alaska Airlines
Deal found 2/2$378
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.
Sat 5/232:40 pm
IAD
-
GTF
1 stop8h 39m
United Airlines
Sat 5/302:29 pm
GTF
-
IAD
1 stop8h 08m
United Airlines
Deal found 2/3$393
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 3/2412:14 pm
IAD
-
GTF
2 stops12h 16m
Delta
Wed 3/251:05 pm
GTF
-
IAD
1 stop8h 35m
Delta
Deal found 2/3$404
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 3/247:11 pm
IAD
-
GTF
1 stop23h 15m
Alaska Airlines
Thu 3/265:06 pm
GTF
-
IAD
1 stop10h 34m
Alaska Airlines
Deal found 2/3$412
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.
Wed 3/257:00 am
IAD
-
GTF
1 stop11h 26m
Alaska Airlines
Mon 3/305:06 pm
GTF
-
IAD
1 stop10h 34m
Alaska Airlines
Deal found 2/2$423
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.
Wed 7/298:35 am
IAD
-
GTF
2 stops14h 44m
United Airlines
Mon 8/32:29 pm
GTF
-
IAD
1 stop8h 08m
United Airlines
Deal found 2/3$486
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 3/247:00 am
IAD
-
GTF
1 stop11h 26m
Alaska Airlines
Wed 3/255:06 pm
GTF
-
IAD
1 stop23h 05m
Alaska Airlines
Deal found 2/3$494
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.
Sat 2/213:58 pm
IAD
-
GTF
1 stop7h 35m
United Airlines
Sat 3/72:30 pm
GTF
-
IAD
1 stop12h 47m
United Airlines
Deal found 2/3$496

Find flight deals from Dulles Intl to Great Falls

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Great Falls (GTF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 4, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$311
(Alaska Airlines)

One-way from

$149
(United Airlines)

Popular in

January

Cheapest in

August

Average price

$587
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Great Falls flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Great Falls flights.
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From Washington, D.C. Dulles Intl to Great Falls
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Great Falls
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Great Falls 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 4, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Great Falls that are best for you.

Fly from

Dulles Intl

Fly to

Great Falls

Route

Depart

Return

Price

Washington, D.C.Great Falls

IAD - GTF

IADGTF

Washington, D.C. Dulles Intl

Sat 5/23

5:33 pm-6:12 pm

1 stop26h 39m

Great Falls

Sat 5/30

6:52 pm-7:34 am

1 stop10h 42m

$378

Washington, D.C.Great Falls

IAD - GTF

IADGTF

Washington, D.C. Dulles Intl

Sat 5/23

2:40 pm-9:19 pm

1 stop8h 39m

Great Falls

Sat 5/30

2:29 pm-12:37 am

1 stop8h 08m

$393

Washington, D.C.Great Falls

IAD - GTF

IADGTF

Washington, D.C. Dulles Intl

Tue 3/24

7:00 am-5:42 pm

2 stops12h 42m

Great Falls

Wed 3/25

1:05 pm-11:40 pm

1 stop8h 35m

$404

Washington, D.C.Great Falls

IAD - GTF

IADGTF

Washington, D.C. Dulles Intl

Tue 3/24

7:11 pm-4:26 pm

1 stop23h 15m

Great Falls

Thu 3/26

5:06 pm-5:40 am

1 stop10h 34m

$412

Washington, D.C.Great Falls

IAD - GTF

IADGTF

Washington, D.C. Dulles Intl

Wed 3/25

7:00 am-4:26 pm

1 stop11h 26m

Great Falls

Mon 3/30

5:06 pm-5:40 am

1 stop10h 34m

$423

Washington, D.C.Great Falls

IAD - GTF

IADGTF

Washington, D.C. Dulles Intl

Tue 3/24

7:00 am-4:26 pm

1 stop11h 26m

Great Falls

Wed 3/25

5:06 pm-6:11 pm

1 stop23h 05m

$494

Washington, D.C.Great Falls

IAD - GTF

IADGTF

Washington, D.C. Dulles Intl

Sat 2/21

3:58 pm-9:33 pm

1 stop7h 35m

Great Falls

Sat 3/7

2:30 pm-5:17 am

1 stop12h 47m

$496

Washington, D.C.Great Falls

IAD - GTF

IADGTF

Washington, D.C. Dulles Intl

Wed 5/27

2:40 pm-9:19 pm

1 stop8h 39m

$149

Washington, D.C.Great Falls

IAD - GTF

IADGTF

Washington, D.C. Dulles Intl

Wed 5/20

6:20 am-8:17 pm

2 stops39h 57m

$217

Washington, D.C.Great Falls

IAD - GTF

IADGTF

Washington, D.C. Dulles Intl

Tue 5/19

2:37 pm-9:18 pm

1 stop8h 41m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 14 results
1
2
  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Great Falls flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Washington, D.C. Dulles Intl Airport-Great Falls flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Great Falls flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Great Falls flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Great Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Great Falls

Have a flexible travel schedule? Discover the best time to fly to Great Falls from Dulles Intl 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.

Reviews of airlines servicing Great Falls

Get insights into the airlines that provide service to Great Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Great Falls. Reviews last updated February 4, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Great Falls, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,236 reviews

Food

6.6

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,236 reviews
United Airlines
7.4
Good
9,236 reviews

Food

6.6

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Great Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Great Falls from Washington, D.C. Dulles Intl?

    Great Falls (GTF), located 3.5 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Great Falls. 1 airline have flights to Great Falls from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Great Falls should not be difficult; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Great Falls?

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Great Falls in 8h 39m. Fly via Alaska Airlines, United Airlines, or Delta to get the fastest option. The distance between Washington, D.C. Dulles Intl Airport and Great Falls is about 1789 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Great Falls round-trip?

    Flying on United Airlines is currently your cheapest option to Great Falls, with prices starting at $384.

  • Can I find deals for flights from Dulles Intl to Great Falls that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Great Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Great Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Great Falls.

  • Can I find deals for business class flights from Dulles Intl to Great Falls?

    Yes. Cheapflights offers flight deals from Dulles Intl to Great Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Top airline flying from Dulles Intl to Great Falls

Discover the top airline that operate flights from Dulles Intl to Great Falls. 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 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$384Average$593FlexibilityNo cancel feeOn-time69%

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