HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$210+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — IAD
Jul 14 — Jul 211
Mon 7/14
Mon 7/21
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Great Falls to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 9, 2025.

Round-trip from

$404
(Delta)

One-way from

$210
(United Airlines)

Popular in

April

Cheapest in

November

Average price

$672
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. 31% potential increase in price ($287 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 9, 2025.

This Delta deal was found by Cheapflights users on 7/6. 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 8/236:00 amGTF - IAD
1 stop5h 25mDelta
Tue 8/267:22 amIAD - GTF
2 stops12h 04mDelta
Deal found 7/6$404
This Alaska Airlines deal was found by Cheapflights users on 7/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/206:15 pmGTF - IAD
1 stop28h 08mAlaska Airlines
Fri 10/247:48 pmIAD - GTF
1 stop23h 47mAlaska Airlines
Deal found 7/7$468
This United Airlines deal was found by Cheapflights users on 7/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/297:00 amGTF - IAD
1 stop28h 26mUnited Airlines
Mon 9/16:00 amIAD - GTF
2 stops17h 28mUnited Airlines
Deal found 7/9$512

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 July 9, 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

Sat 8/23

6:00 am-1:25 pm

1 stop5h 25m

Washington, D.C. Dulles Intl

Tue 8/26

7:22 am-5:26 pm

2 stops12h 04m

$404

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Mon 10/20

6:15 pm-12:23 am

1 stop28h 08m

Washington, D.C. Dulles Intl

Fri 10/24

7:48 pm-5:35 pm

1 stop23h 47m

$468

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Fri 8/29

7:00 am-1:26 pm

1 stop28h 26m

Washington, D.C. Dulles Intl

Mon 9/1

6:00 am-9:28 pm

2 stops17h 28m

$512

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Thu 8/7

2:35 pm-12:45 am

1 stop8h 10m

$210

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 12/20

1:10 pm-11:25 pm

1 stop8h 15m

$340

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/7

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 July 9, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta, and 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,954 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,842 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines flying from Great Falls to Washington, D.C. Dulles Intl Airport round-trip?

    Flying on Delta is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $404. Additional round-trip tickets that might be worth considering are offered by Alaska Airlines and United Airlines, with the lowest prices starting at $468 and $512, respectively. Delta 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.

  • 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 $309). 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 Great Falls?

Book flights to Great Falls if you plan to visit one of these locations
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Fredericksburg
Gaithersburg
Easton
Fairfax
Towson
Linthicum Heights
Waldorf
Laurel
Falls Church
Rockville
Springfield
National Harbor
Manassas
Dundalk
Bowie

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 July 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$424Average$469FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.