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Dulles Intl

$201+ 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 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — IAD
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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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 septiembre 11, 2025.

Round-trip from

$402
(Delta)

One-way from

$201
(Alaska Airlines)

Popular in

April

Cheapest in

November

Average price

$600
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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Highest demand for flights based on searches. 30% potential increase in price ($273 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 septiembre 11, 2025.

This Delta deal was found by Cheapflights users on 9/11. 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.
sáb. 10/251:08 pmGTF - IAD
1 stop8h 25mDelta
sáb. 11/16:15 amIAD - GTF
1 stop8h 13mDelta
Deal found 9/11$402
This Delta deal was found by Cheapflights users on 9/10. 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.
sáb. 10/251:08 pmGTF - IAD
1 stop8h 25mDelta
mar. 10/281:00 pmIAD - GTF
2 stops12h 06mDelta
Deal found 9/10$408
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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.
mié. 11/196:50 pmGTF - IAD
1 stop19h 50mAlaska Airlines
vie. 12/57:35 amIAD - GTF
1 stop13h 20mAlaska Airlines
Deal found 9/9$422
This Delta deal was found by Cheapflights users on 9/11. 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.
sáb. 10/251:08 pmGTF - IAD
1 stop8h 25mDelta
mié. 10/297:35 amIAD - GTF
2 stops11h 54mDelta
Deal found 9/11$423
This Delta deal was found by Cheapflights users on 9/11. 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.
sáb. 10/251:08 pmGTF - IAD
1 stop8h 25mDelta
vie. 10/317:35 amIAD - GTF
2 stops17h 31mDelta
Deal found 9/11$433
This Delta deal was found by Cheapflights users on 9/11. 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.
sáb. 10/251:08 pmGTF - IAD
1 stop8h 25mDelta
jue. 10/306:15 amIAD - GTF
1 stop8h 13mDelta
Deal found 9/11$439
This Delta deal was found by Cheapflights users on 9/9. 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.
mié. 11/191:12 pmGTF - IAD
1 stop8h 17mDelta
mié. 12/37:15 amIAD - GTF
2 stops12h 13mDelta
Deal found 9/9$450
This Delta deal was found by Cheapflights users on 9/9. 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.
lun. 11/241:12 pmGTF - IAD
1 stop8h 17mDelta
mié. 12/37:15 amIAD - GTF
2 stops12h 13mDelta
Deal found 9/9$460
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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.
vie. 10/246:15 pmGTF - IAD
1 stop11h 18mAlaska Airlines
mar. 10/287:43 amIAD - GTF
1 stop12h 27mAlaska Airlines
Deal found 9/10$462
This Delta deal was found by Cheapflights users on 9/11. 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.
sáb. 11/226:10 pmGTF - IAD
2 stops13h 00mDelta
mié. 12/37:15 amIAD - GTF
2 stops12h 13mDelta
Deal found 9/11$465

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 septiembre 11, 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

sáb. 2/7

1:10 pm-11:50 pm

1 stop8h 40m

Washington, D.C. Dulles Intl

mié. 2/11

7:15 am-12:32 pm

1 stop7h 17m

$402

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

sáb. 10/25

1:08 pm-11:33 pm

1 stop8h 25m

Washington, D.C. Dulles Intl

mar. 10/28

6:15 am-12:28 pm

1 stop8h 13m

$402

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

sáb. 10/25

1:08 pm-11:33 pm

1 stop8h 25m

Washington, D.C. Dulles Intl

jue. 10/30

6:15 am-12:28 pm

1 stop8h 13m

$439

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

mié. 11/19

1:12 pm-11:29 pm

1 stop8h 17m

Washington, D.C. Dulles Intl

mié. 12/3

7:15 am-5:28 pm

2 stops12h 13m

$450

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

sáb. 11/22

6:10 pm-9:10 am

2 stops13h 00m

Washington, D.C. Dulles Intl

sáb. 12/6

7:15 am-5:28 pm

2 stops12h 13m

$465

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

lun. 11/24

6:10 pm-9:10 am

2 stops13h 00m

Washington, D.C. Dulles Intl

mié. 12/3

7:15 am-5:28 pm

2 stops12h 13m

$465

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

dom. 2/8

5:30 am-11:16 pm

2 stops15h 46m

Washington, D.C. Dulles Intl

mié. 2/11

7:15 am-12:32 pm

1 stop7h 17m

$473

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

lun. 11/24

1:12 pm-11:29 pm

1 stop8h 17m

Washington, D.C. Dulles Intl

jue. 12/4

11:58 am-12:31 pm

2 stops26h 33m

$475

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

sáb. 9/27

1:05 pm-11:33 pm

1 stop8h 28m

Washington, D.C. Dulles Intl

mar. 10/7

6:15 am-12:28 pm

1 stop8h 13m

$479

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

dom. 11/23

6:10 pm-9:10 am

2 stops13h 00m

Washington, D.C. Dulles Intl

sáb. 12/6

7:05 am-12:31 pm

1 stop7h 26m

$482

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 22 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 septiembre 11, 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
8,937 reviews

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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 $402, Delta can have you in Washington, D.C. Dulles Intl Airport from Great Falls in 8h 40m. The distance from Great Falls to Washington, D.C. Dulles Intl Airport is about 1789 mi.

  • 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 $424. United Airlines is priced at 33% 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.

  • What is the cheapest month to book a flight from Great Falls to Washington, D.C. Dulles Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from Great Falls to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Great Falls to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
Woodbridge
Alexandria
Arlington
Tysons
Silver Spring
Springfield
Gaithersburg
Fredericksburg
Linthicum Heights
Fairfax
Falls Church
Owings Mills
Manassas
Rockville
Hanover
Oxon Hill
Laurel
Towson
Dundalk
National Harbor

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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$424Average$498FlexibilityNo cancel feeOn-time69%

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