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Dulles Intl

$182+ 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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — IAD
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
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 6, 2025.

This Alaska Airlines deal was found by Cheapflights users on 11/4. 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.
Tue 12/97:35 pmGTF - IAD
1 stop19h 01mAlaska Airlines
Tue 12/167:34 amIAD - GTF
1 stop13h 21mAlaska Airlines
Deal found 11/4$324
This Delta deal was found by Cheapflights users on 11/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/91:12 pmGTF - IAD
2 stops9h 00mDelta
Tue 12/167:05 amIAD - GTF
1 stop7h 26mDelta
Deal found 11/4$384
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/202:30 pmGTF - IAD
1 stop6h 45mUnited Airlines
Mon 11/245:18 pmIAD - GTF
1 stop7h 21mUnited Airlines
Deal found 11/4$558
This Delta deal was found by Cheapflights users on 11/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/201:12 pmGTF - IAD
1 stop8h 46mDelta
Mon 11/2410:05 amIAD - GTF
2 stops14h 25mDelta
Deal found 11/4$599
This Alaska Airlines deal was found by Cheapflights users on 11/4. 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.
Mon 12/227:21 pmGTF - IAD
1 stop8h 52mAlaska Airlines
Wed 12/317:33 amIAD - GTF
1 stop13h 08mAlaska Airlines
Deal found 11/4$680
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Wed 12/242:35 pmGTF - IAD
2 stops28h 43mUnited Airlines
Wed 12/316:20 amIAD - GTF
1 stop9h 19mUnited Airlines
Deal found 11/4$682

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 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$324
(Alaska Airlines)

One-way from

$182
(Kiwi.com)

Popular in

April

Cheapest in

October

Average price

$441
Provider with most accurate pricing for Great Falls-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Great Falls-Washington, D.C. (WAS) 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
Search Deals
Highest demand for flights based on searches. 29% potential increase in price ($268 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($37 potential savings vs. average RT price).
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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 6, 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 12/9

7:35 pm-4:36 pm

1 stop19h 01m

Washington, D.C. Dulles Intl

Tue 12/16

7:34 am-6:55 pm

1 stop13h 21m

$324

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 12/9

1:12 pm-12:12 am

2 stops9h 00m

Washington, D.C. Dulles Intl

Tue 12/16

7:05 am-12:31 pm

1 stop7h 26m

$384

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Thu 1/15

1:15 pm-11:48 pm

1 stop8h 33m

Washington, D.C. Dulles Intl

Tue 1/20

7:30 am-5:30 pm

2 stops12h 00m

$416

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Wed 12/24

7:21 pm-6:13 am

1 stop8h 52m

Washington, D.C. Dulles Intl

Wed 12/31

7:33 am-6:41 pm

1 stop13h 08m

$458

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Wed 3/25

1:10 pm-11:50 pm

1 stop8h 40m

Washington, D.C. Dulles Intl

Tue 3/31

10:05 am-10:53 pm

2 stops14h 48m

$497

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Thu 11/20

9:04 pm-11:59 pm

2 stops24h 55m

$182

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Fri 12/19

10:25 pm-11:56 am

2 stops35h 31m

$194

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sun 11/30

10:25 pm-2:29 pm

3 stops38h 04m

$273

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Thu 11/20

2:30 pm-11:15 pm

1 stop6h 45m

$279

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 12/20

2:35 pm-11:23 pm

1 stop6h 48m

$283

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 11 results
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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.

Cheapflights Insights

Everything you need to know about your flight from Great Falls to Washington, D.C. Dulles Intl Airport

How much does it cost to fly round-trip from Great Falls to Washington, D.C. Dulles Intl Airport?

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 6, 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
9,007 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

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
9,007 reviews
United Airlines
7.4
Good
9,007 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

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 $384, Alaska Airlines can have you in Washington, D.C. Dulles Intl Airport from Great Falls in 9h. 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 34% 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
Fairfax
Fredericksburg
Falls Church
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Waldorf
Bowie
Largo
McLean

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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 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$420Average$789FlexibilityNo cancel feeOn-time69%

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