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Dulles Intl

$342+ 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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — IAD
Mar 25 — Apr 11
Wed 3/25
Wed 4/1
1 adult, Economy
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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 23, 2026.

This United Airlines deal was found by Cheapflights users on 2/20. 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 3/76:15 am
GTF
-
IAD
1 stop8h 25m
United Airlines
Wed 3/114:00 pm
IAD
-
GTF
1 stop7h 11m
United Airlines
Deal found 2/20$348
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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 4/205:06 pm
GTF
-
IAD
1 stop10h 34m
Alaska Airlines
Wed 4/227:10 am
IAD
-
GTF
1 stop12h 25m
Alaska Airlines
Deal found 2/19$349
This United Airlines deal was found by Cheapflights users on 2/22. 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.
Mon 4/202:30 pm
GTF
-
IAD
1 stop7h 04m
United Airlines
Wed 4/224:00 pm
IAD
-
GTF
1 stop7h 17m
United Airlines
Deal found 2/22$366
This United Airlines deal was found by Cheapflights users on 2/21. 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 10/272:25 pm
GTF
-
IAD
1 stop6h 48m
United Airlines
Sat 10/314:08 pm
IAD
-
GTF
1 stop8h 22m
United Airlines
Deal found 2/21$413
This Delta deal was found by Cheapflights users on 2/21. 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.
Sun 3/16:20 pm
GTF
-
IAD
2 stops12h 53m
Delta
Wed 3/410:08 am
IAD
-
GTF
2 stops14h 21m
Delta
Deal found 2/21$449
This Delta deal was found by Cheapflights users on 2/23. 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 10/206:20 pm
GTF
-
IAD
2 stops12h 51m
Delta
Mon 10/267:15 am
IAD
-
GTF
1 stop7h 12m
Delta
Deal found 2/23$454
This Delta deal was found by Cheapflights users on 2/19. 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 4/205:30 am
GTF
-
IAD
2 stops16h 25m
Delta
Wed 4/227:00 am
IAD
-
GTF
2 stops12h 40m
Delta
Deal found 2/19$458

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 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$348
(United Airlines)

One-way from

$342
(United Airlines)
Provider with most accurate pricing for Great Falls-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Great Falls-Washington, D.C. Dulles Intl flights.
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From Great Falls to Washington, D.C. Dulles Intl
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One-way flight from Great Falls to Washington, D.C. Dulles Intl
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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 23, 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

Mon 4/20

5:06 pm-5:40 am

1 stop10h 34m

Washington, D.C. Dulles Intl

Wed 4/22

7:10 am-5:35 pm

1 stop12h 25m

$349

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Mon 4/20

2:30 pm-7:27 am

2 stops14h 57m

Washington, D.C. Dulles Intl

Wed 4/22

4:00 pm-9:17 pm

1 stop7h 17m

$456

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Mon 4/20

5:30 am-11:55 pm

2 stops16h 25m

Washington, D.C. Dulles Intl

Wed 4/22

7:00 am-5:40 pm

2 stops12h 40m

$458

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 3/7

6:15 am-8:57 pm

2 stops12h 42m

Washington, D.C. Dulles Intl

Wed 3/11

4:00 pm-9:11 pm

1 stop7h 11m

$687

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Wed 7/1

6:20 pm-10:02 am

2 stops13h 42m

Washington, D.C. Dulles Intl

Sun 7/19

7:15 am-12:23 pm

1 stop7h 08m

$819

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Mon 6/8

6:20 pm-9:10 am

2 stops12h 50m

Washington, D.C. Dulles Intl

Sat 6/13

7:15 am-12:23 pm

1 stop7h 08m

$829

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Thu 4/2

2:30 pm-11:34 pm

1 stop7h 04m

$357

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

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*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 23, 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
9,342 reviews

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

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
9,342 reviews
United Airlines
7.4
Good
9,342 reviews

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

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 $349, Alaska Airlines can have you in Washington, D.C. Dulles Intl Airport from Great Falls in 10h 34m. 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
Hyattsville
Fredericksburg
Hanover
Laurel
Rockville
Upper Marlboro
Linthicum Heights
Manassas
Bowie
Largo
Clinton
Towson

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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 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$420Average$820FlexibilityNo cancel feeOn-time69%

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