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 $353. Additional round-trip tickets that might be worth considering are offered by United Airlines and Alaska Airlines, with the lowest prices starting at $432 and $994, respectively. Delta is priced at 43% lower than the current average price of a flight leaving 3 months from now.

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 July is currently the most expensive (average of $346). 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.

What is the cheapest day to fly from Great Falls to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Great Falls to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday at noon when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What is the cheapest day to fly round-trip from Great Falls to Washington, D.C. Dulles Intl Airport?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 67% on your flight compared to booking on days when demand is much higher.

What is the cheapest time of day to fly from GTF to IAD?

One of the essential ways to save on airfare from Great Falls to Washington, D.C. Dulles Intl Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 36% on airfare.

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.

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.

$353+ Flights from Great Falls to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Great Falls to Dulles Intl

Round-trip from	$353 (Delta)
Popular in	April
Cheapest in	November
Average price	$674

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 June 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 June 26, 2025.

Sat 8/236:06 pmGTF - IAD

2 stops13h 06mDelta

Tue 8/266:00 amIAD - GTF

2 stops13h 26mDelta

Deal found 6/25

$353

Wed 10/292:30 pmGTF - IAD

1 stop6h 45mUnited Airlines

Fri 10/318:25 amIAD - GTF

1 stop7h 08mUnited Airlines

Deal found 6/24

$390

Tue 10/286:53 pmGTF - IAD

1 stop9h 30mAlaska Airlines

Fri 10/317:43 amIAD - GTF

1 stop12h 30mAlaska Airlines

Deal found 6/24

$435

Best flights from Great Falls to Dulles Intl
Discover carefully curated flight deals from Great Falls to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 26, 2025.

Sat 8/236:06 pmGTF - IAD

2 stops13h 06mDelta

Tue 8/266:00 amIAD - GTF

2 stops13h 26mDelta

Deal found 6/25

$353

Tue 7/222:35 pmGTF - IAD

1 stop8h 10mUnited Airlines

Tue 7/292:45 pmIAD - GTF

1 stop8h 28mUnited Airlines

Deal found 6/24

$432

Wed 7/94:55 pmGTF - IAD

1 stop22h 18mAlaska Airlines

Wed 7/169:00 amIAD - GTF

1 stop9h 13mAlaska Airlines

Deal found 6/25

$994

Last-minute flights from Great Falls to Dulles Intl
Discover last-minute flight deals from Great Falls to Dulles Intl. Data last updated June 26, 2025 and is based on user searches.

Thu 7/32:35 pmGTF - IAD

1 stop21h 01mUnited Airlines

Sat 7/128:06 pmIAD - GTF

1 stop19h 30mUnited Airlines

Deal found 6/26

$755

Thu 7/35:42 amGTF - IAD

2 stops8h 51mDelta

Sat 7/121:00 pmIAD - GTF

2 stops11h 45mDelta

Deal found 6/26

$837

Wed 7/96:25 amGTF - IAD

1 stop20h 59mUnited Airlines

Sun 7/138:15 amIAD - GTF

2 stops14h 58mUnited Airlines

Deal found 6/25

$666

Wed 7/94:55 pmGTF - IAD

1 stop22h 18mAlaska Airlines

Wed 7/169:00 amIAD - GTF

1 stop9h 13mAlaska Airlines

Deal found 6/25

$994

Fri 7/256:19 pmGTF - IAD

2 stops13h 37mDelta

Mon 8/410:14 amIAD - GTF

2 stops14h 31mDelta

Deal found 6/26

$623

One-way flights from Great Falls to Dulles Intl
Search for one-way flight options from Great Falls to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated June 26, 2025.

Sat 7/126:19 pmGTF - IAD

2 stops12h 40mDelta

Deal found 6/26

$359

Sat 7/122:35 pmGTF - IAD

1 stop8h 10mUnited Airlines

Deal found 6/25

$392

Cheapflights Fare Finder

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

Fly to

Route

Depart

Return

Price

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 8/23

6:06 pm-9:12 am

2 stops13h 06m

Washington, D.C. Dulles Intl

Tue 8/26

6:00 am-5:26 pm

2 stops13h 26m

$353

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 7/22

2:35 pm-12:45 am

1 stop8h 10m

Washington, D.C. Dulles Intl

Tue 7/29

2:45 pm-9:13 pm

1 stop8h 28m

$432

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Wed 7/9

4:55 pm-5:13 pm

1 stop22h 18m

Washington, D.C. Dulles Intl

Wed 7/16

9:00 am-4:13 pm

1 stop9h 13m

$994

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 7/12

6:19 pm-8:59 am

2 stops12h 40m

$359

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Sat 7/12

2:35 pm-12:45 am

1 stop8h 10m

$392

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/26

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

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

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

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

7,963 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

8,838 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

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 $353. Additional round-trip tickets that might be worth considering are offered by United Airlines and Alaska Airlines, with the lowest prices starting at $432 and $994, respectively. Delta is priced at 43% 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 July is currently the most expensive (average of $346). 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

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Top airline flying from Great Falls to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$424	Average$469	FlexibilityNo cancel fee	On-time69%

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$353+ Cheap flights from Great Falls (GTF) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/23. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Great Falls to Dulles Intl with Cheapflights

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Cheap flight deals from Great Falls to Dulles Intl

Round-trip from

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Cheapest in

Average price

Find flight deals from Great Falls to Dulles Intl

Cheapest flights from Great Falls to Dulles IntlExplore 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 June 26, 2025.

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 June 26, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Great Falls to Washington, D.C. Dulles Intl Airport that are best for you.

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.

Reviews of airlines servicing Dulles Intl

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?

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

Can I find deals for flights from Great Falls to Dulles Intl that include hotel bookings?

How can I find direct flights from Great Falls to Dulles Intl?

Can I find deals for business class flights from Great Falls to Dulles Intl?

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

Traveling to a place near Great Falls?

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Top airline flying from Great Falls to Dulles Intl

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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 June 26, 2025.