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Dulles Intl

$263+ 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
Nov 9 — Nov 161
Sun 11/9
Sun 11/16
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 October 10, 2025.

This Alaska Airlines deal was found by Cheapflights users on 10/9. 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.
Wed 12/107:35 pmGTF - IAD
1 stop19h 01mAlaska Airlines
Sat 12/137:34 amIAD - GTF
1 stop13h 21mAlaska Airlines
Deal found 10/9$392
This Alaska Airlines deal was found by Cheapflights users on 10/8. 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 11/76:50 pmGTF - IAD
1 stop19h 50mAlaska Airlines
Fri 11/147:43 amIAD - GTF
1 stop12h 27mAlaska Airlines
Deal found 10/8$420
This Delta deal was found by Cheapflights users on 10/8. 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.
Fri 11/71:08 pmGTF - IAD
1 stop8h 25mDelta
Fri 11/147:15 amIAD - GTF
2 stops12h 15mDelta
Deal found 10/8$446
This Delta deal was found by Cheapflights users on 10/7. 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 12/101:12 pmGTF - IAD
1 stop8h 17mDelta
Sat 12/136:55 amIAD - GTF
2 stops18h 27mDelta
Deal found 10/7$461
This United Airlines deal was found by Cheapflights users on 10/7. 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 10/232:31 pmGTF - IAD
1 stop12h 51mUnited Airlines
Mon 10/2710:10 pmIAD - GTF
1 stop26h 29mUnited Airlines
Deal found 10/7$599
This United Airlines deal was found by Cheapflights users on 10/8. 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.
Fri 11/72:30 pmGTF - IAD
2 stops14h 48mUnited Airlines
Fri 11/1410:23 pmIAD - GTF
2 stops17h 10mUnited Airlines
Deal found 10/8$648

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 October 10, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$404
(Alaska Airlines)

One-way from

$263
(Alaska Airlines)

Popular in

April

Cheapest in

October

Average price

$420
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 October 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 October 10, 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

Wed 12/10

7:35 pm-4:36 pm

1 stop19h 01m

Washington, D.C. Dulles Intl

Sat 12/13

7:34 am-6:55 pm

1 stop13h 21m

$392

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Fri 11/7

6:50 pm-4:40 pm

1 stop19h 50m

Washington, D.C. Dulles Intl

Fri 11/14

7:43 am-6:10 pm

1 stop12h 27m

$420

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 2/24

4:00 pm-5:55 pm

1 stop23h 55m

Washington, D.C. Dulles Intl

Sun 3/1

7:00 am-3:20 pm

1 stop10h 20m

$429

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Fri 11/7

1:08 pm-11:33 pm

1 stop8h 25m

Washington, D.C. Dulles Intl

Fri 11/14

7:15 am-5:30 pm

2 stops12h 15m

$446

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Wed 12/10

1:12 pm-11:29 pm

1 stop8h 17m

Washington, D.C. Dulles Intl

Sat 12/13

6:55 am-11:22 pm

2 stops18h 27m

$461

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Thu 10/23

2:31 pm-5:22 am

1 stop12h 51m

Washington, D.C. Dulles Intl

Mon 10/27

10:10 pm-10:39 pm

1 stop26h 29m

$599

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 12/20

7:21 pm-6:13 am

1 stop8h 52m

$263

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sun 10/19

6:15 pm-7:33 am

1 stop11h 18m

$314

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sun 10/19

1:05 pm-11:18 pm

2 stops32h 13m

$472

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 12/20

2:35 pm-3:17 pm

2 stops22h 42m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/8

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 October 10, 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
8,968 reviews

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,968 reviews
United Airlines
7.4
Good
8,968 reviews

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

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 $446, Alaska Airlines can have you in Washington, D.C. Dulles Intl Airport from Great Falls in 8h 25m. 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
Woodbridge
Arlington
Tysons
Silver Spring
Springfield
Hanover
Gaithersburg
Fredericksburg
Fairfax
Linthicum Heights
Falls Church
Owings Mills
Manassas
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Rockville

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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 October 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$420Average$498FlexibilityNo cancel feeOn-time69%

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