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Dulles Intl

$293+ 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 12/20. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — IAD
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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Find 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 November 26, 2025.

This Delta deal was found by Cheapflights users on 11/26. 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 12/171:12 pmGTF - IAD
1 stop8h 17mDelta
Tue 1/67:30 amIAD - GTF
2 stops12h 00mDelta
Deal found 11/26$377
This Delta deal was found by Cheapflights users on 11/26. 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 12/171:12 pmGTF - IAD
1 stop8h 17mDelta
Wed 1/77:05 amIAD - GTF
1 stop7h 28mDelta
Deal found 11/26$378
This Delta deal was found by Cheapflights users on 11/26. 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 12/171:12 pmGTF - IAD
1 stop8h 17mDelta
Thu 1/87:30 amIAD - GTF
2 stops12h 00mDelta
Deal found 11/26$387
This Delta deal was found by Cheapflights users on 11/26. 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 12/171:12 pmGTF - IAD
1 stop8h 17mDelta
Fri 1/99:00 amIAD - GTF
2 stops15h 30mDelta
Deal found 11/26$433
This Delta deal was found by Cheapflights users on 11/26. 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 12/181:12 pmGTF - IAD
1 stop8h 17mDelta
Tue 1/67:30 amIAD - GTF
2 stops12h 00mDelta
Deal found 11/26$459
This Delta deal was found by Cheapflights users on 11/26. 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 12/181:12 pmGTF - IAD
1 stop8h 17mDelta
Wed 1/77:05 amIAD - GTF
1 stop7h 28mDelta
Deal found 11/26$460
This Delta deal was found by Cheapflights users on 11/26. 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 12/131:12 pmGTF - IAD
1 stop8h 17mDelta
Wed 1/77:30 amIAD - GTF
2 stops12h 00mDelta
Deal found 11/26$467
This Delta deal was found by Cheapflights users on 11/23. 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 12/91:12 pmGTF - IAD
1 stop8h 17mDelta
Tue 12/167:05 amIAD - GTF
1 stop7h 26mDelta
Deal found 11/23$468
This Delta deal was found by Cheapflights users on 11/26. 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 12/181:12 pmGTF - IAD
1 stop8h 17mDelta
Thu 1/87:30 amIAD - GTF
2 stops12h 00mDelta
Deal found 11/26$469
This Delta deal was found by Cheapflights users on 11/26. 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 12/136:10 pmGTF - IAD
2 stops13h 01mDelta
Tue 1/67:30 amIAD - GTF
2 stops12h 00mDelta
Deal found 11/26$472

Cheap 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 November 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$377
(Delta)

One-way from

$293
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$635
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
Highest demand for flights based on searches. 17% potential increase in price ($145 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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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 November 26, 2025.
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

Tue 1/20

5:59 pm-4:26 pm

1 stop20h 27m

Washington, D.C. Dulles Intl

Sat 1/24

6:04 pm-5:19 pm

1 stop25h 15m

$390

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 1/20

6:10 pm-11:10 pm

2 stops27h 00m

Washington, D.C. Dulles Intl

Sat 1/24

7:30 am-12:32 pm

2 stops31h 02m

$396

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 4/18

1:10 pm-11:51 pm

1 stop8h 41m

Washington, D.C. Dulles Intl

Wed 5/6

7:15 am-12:23 pm

1 stop7h 08m

$466

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 12/9

1:12 pm-11:29 pm

1 stop8h 17m

Washington, D.C. Dulles Intl

Tue 12/16

7:05 am-12:31 pm

1 stop7h 26m

$468

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 4/18

1:10 pm-11:51 pm

1 stop8h 41m

Washington, D.C. Dulles Intl

Sun 5/3

7:15 am-12:23 pm

1 stop7h 08m

$476

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 4/18

1:10 pm-11:51 pm

1 stop8h 41m

Washington, D.C. Dulles Intl

Sat 5/2

7:15 am-12:23 pm

1 stop7h 08m

$476

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 12/20

2:35 pm-11:23 pm

1 stop6h 48m

$293

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/25

  • 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 November 26, 2025.
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
9,046 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,046 reviews
United Airlines
7.4
Good
9,046 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 $390, Alaska Airlines can have you in Washington, D.C. Dulles Intl Airport from Great Falls in 20h 27m. 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. United Airlines is priced at 38% lower than the current average price of a flight leaving 3 months from now.

  • 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
Tysons
Woodbridge
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Fairfax
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Falls Church
Bowie
Largo
McLean
Clinton

Browse thousands of different options on Cheapflights for your next trip

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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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$420Average$789FlexibilityNo cancel feeOn-time69%

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