HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$133+ Cheap flights from Great Falls (GTF) 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — IAD
Mar 9 — Mar 161
Mon 3/9
Mon 3/16
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Great Falls to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Great Falls to Dulles Intl

Cheapest flights from Great Falls to Dulles Intl
Explore the most affordable flight options available from Great Falls to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 7, 2026.

This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/196:25 am
GTF
-
IAD
1 stop8h 22m
United Airlines
Mon 2/232:12 pm
IAD
-
GTF
1 stop9h 21m
United Airlines
Deal found 2/4$348
This Alaska Airlines deal was found by Cheapflights users on 2/6. 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 3/134:57 pm
GTF
-
IAD
1 stop10h 43m
Alaska Airlines
Tue 3/177:05 am
IAD
-
GTF
1 stop11h 12m
Alaska Airlines
Deal found 2/6$367
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/64:57 pm
GTF
-
IAD
1 stop10h 43m
Alaska Airlines
Fri 3/137:05 am
IAD
-
GTF
1 stop11h 12m
Alaska Airlines
Deal found 2/4$378
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.
Sat 3/286:22 pm
GTF
-
IAD
2 stops12h 48m
Delta
Wed 4/112:14 pm
IAD
-
GTF
2 stops12h 16m
Delta
Deal found 2/5$386
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/204:57 pm
GTF
-
IAD
1 stop10h 43m
Alaska Airlines
Tue 2/247:05 am
IAD
-
GTF
1 stop11h 12m
Alaska Airlines
Deal found 2/5$388
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 7/286:20 pm
GTF
-
IAD
2 stops13h 42m
Delta
Mon 8/37:15 am
IAD
-
GTF
1 stop17h 29m
Delta
Deal found 2/3$443
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.
Mon 8/176:20 pm
GTF
-
IAD
2 stops12h 50m
Delta
Fri 8/217:25 am
IAD
-
GTF
1 stop6h 58m
Delta
Deal found 2/5$444
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 7/226:20 pm
GTF
-
IAD
2 stops26h 39m
Delta
Mon 8/35:15 pm
IAD
-
GTF
2 stops21h 08m
Delta
Deal found 2/3$447
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.
Tue 7/282:29 pm
GTF
-
IAD
1 stop8h 08m
United Airlines
Sun 8/26:30 am
IAD
-
GTF
1 stop9h 03m
United Airlines
Deal found 2/3$457
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 7/226:20 pm
GTF
-
IAD
2 stops26h 39m
Delta
Tue 7/2810:05 am
IAD
-
GTF
2 stops14h 39m
Delta
Deal found 2/3$463
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/14:57 pm
GTF
-
IAD
1 stop10h 43m
Alaska Airlines
Wed 3/47:05 am
IAD
-
GTF
1 stop12h 43m
Alaska Airlines
Deal found 2/4$471

Find flight deals from Great Falls to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Great Falls (GTF) to Dulles Intl (IAD). 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 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$348
(United Airlines)

One-way from

$133
(United Airlines)
Provider with most accurate pricing for Great Falls-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Great Falls-Washington, D.C. Dulles Intl flights.
Search Deals
From Great Falls to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Great Falls to Washington, D.C. Dulles Intl
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Great Falls 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 7, 2026.
Use the filters below to find and compare flights from Great Falls to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Great Falls

Fly to

Dulles Intl

Route

Depart

Return

Price

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Thu 2/19

6:25 am-4:47 pm

1 stop8h 22m

Washington, D.C. Dulles Intl

Mon 2/23

2:12 pm-9:33 pm

1 stop9h 21m

$348

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Fri 3/13

4:57 pm-5:40 am

1 stop10h 43m

Washington, D.C. Dulles Intl

Tue 3/17

7:05 am-4:17 pm

1 stop11h 12m

$367

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Fri 3/6

4:57 pm-5:40 am

1 stop10h 43m

Washington, D.C. Dulles Intl

Fri 3/13

7:05 am-4:17 pm

1 stop11h 12m

$378

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 3/28

6:22 pm-9:10 am

2 stops12h 48m

Washington, D.C. Dulles Intl

Wed 4/1

12:14 pm-10:30 pm

2 stops12h 16m

$386

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Fri 2/20

4:57 pm-5:40 am

1 stop10h 43m

Washington, D.C. Dulles Intl

Tue 2/24

7:05 am-4:17 pm

1 stop11h 12m

$388

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 7/28

2:29 pm-12:37 am

1 stop8h 08m

Washington, D.C. Dulles Intl

Sun 8/2

6:30 am-1:33 pm

1 stop9h 03m

$457

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Fri 7/24

6:20 pm-10:59 pm

2 stops26h 39m

Washington, D.C. Dulles Intl

Tue 7/28

10:05 am-10:44 pm

2 stops14h 39m

$463

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Fri 2/20

1:15 pm-11:46 pm

1 stop8h 31m

Washington, D.C. Dulles Intl

Tue 2/24

10:08 am-10:29 pm

2 stops14h 21m

$474

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Wed 7/22

2:29 pm-12:37 am

1 stop8h 08m

Washington, D.C. Dulles Intl

Tue 7/28

6:15 am-11:23 am

1 stop7h 08m

$483

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Fri 7/24

6:20 pm-10:59 pm

2 stops26h 39m

Washington, D.C. Dulles Intl

Mon 8/3

7:15 am-12:23 pm

1 stop7h 08m

$518

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/7

Showing 1-10 of 22 results
1
2
3

Compare providers for flights from Great Falls to Dulles Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Great Falls to Dulles Intl in February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Great Falls-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Great Falls-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Great Falls-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Great Falls-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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 Great Falls-Washington, D.C. Dulles Intl Airport 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 Great Falls to Dulles Intl

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

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated February 7, 2026.
Read reviews from past customers who have flown United Airlines from Great Falls to Washington, D.C. Dulles Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,250 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

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
9,250 reviews
United Airlines
7.4
Good
9,250 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

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 Great Falls to Dulles Intl. 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 from for flights from Great Falls to Washington, D.C. Dulles Intl?

    For a flight from Great Falls to Washington, D.C. Dulles Intl, you will be flying from Great Falls. Great Falls (GTF) is just 3.5 mi from the center of the city. Great Falls is the only Great Falls airport and it handles 0 outbound flights to Washington, D.C. Dulles Intl per day. 1 airline has flights to Washington, D.C. Dulles Intl from Great Falls on a regular basis.

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

    For as low as $367, Alaska Airlines can have you in Washington, D.C. Dulles Intl Airport from Great Falls in 10h 43m. The distance from Great Falls to Washington, D.C. Dulles Intl Airport is about 1789 mi. This flight may include one or multiple stops.

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

    Flying on United Airlines is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $420.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Great Falls 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.

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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Great Falls to Dulles Intl

Discover the top airline that operate flights from Great Falls 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 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$420Average$820FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.