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Cheap flights from Great Falls to Washington, D.C. from $282

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Great Falls to Washington, D.C. departing on 11/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Great Falls to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
1:13 pm - 11:35 pm
GTF
-
IAD
8h 22m
1 stop
Delta Logo
7:00 am - 12:33 pm
IAD
-
GTF
7h 33m
1 stop
$338Delta
Tue, Oct 20 - Sat, Oct 24
Delta Logo
1:13 pm - 11:35 pm
GTF
-
IAD
8h 22m
1 stop
Delta Logo
6:00 am - 5:42 pm
IAD
-
GTF
13h 42m
2 stops
$344Delta
Tue, Oct 20 - Sat, Oct 24
Delta Logo
1:13 pm - 11:35 pm
GTF
-
IAD
8h 22m
1 stop
Delta Logo
7:00 am - 12:33 pm
IAD
-
GTF
7h 33m
1 stop
$363Delta
Tue, Oct 20 - Sat, Oct 24
Delta Logo
1:13 pm - 11:35 pm
GTF
-
IAD
8h 22m
1 stop
Delta Logo
6:00 am - 5:42 pm
IAD
-
GTF
13h 42m
2 stops
$369Delta
Tue, Oct 20 - Sat, Oct 24
Delta Logo
5:40 am - 6:19 pm
GTF
-
IAD
10h 39m
2 stops
Delta Logo
6:00 am - 5:42 pm
IAD
-
GTF
13h 42m
2 stops
$414Delta
Tue, Oct 20 - Sat, Oct 24
Delta Logo
1:13 pm - 11:35 pm
GTF
-
IAD
8h 22m
1 stop
Delta Logo
6:00 am - 5:42 pm
IAD
-
GTF
13h 42m
2 stops
$439Delta
Tue, Oct 20 - Sat, Oct 24
Delta Logo
6:18 pm - 9:12 am
GTF
-
IAD
12h 54m
2 stops
Delta Logo
6:00 am - 5:42 pm
IAD
-
GTF
13h 42m
2 stops
$442Delta
Tue, Oct 20 - Sat, Oct 24
Delta Logo
5:40 am - 5:17 pm
GTF
-
IAD
9h 37m
2 stops
Delta Logo
6:00 am - 5:42 pm
IAD
-
GTF
13h 42m
2 stops
$529Delta
Tue, Oct 20 - Sat, Oct 24
Multiple Airlines Logo
10:19 am - 8:20 am
GTF
-
IAD
20h 01m
1 stop
Multiple Airlines Logo
8:33 pm - 8:20 pm
IAD
-
GTF
49h 47m
2 stops
$555Multiple Airlines
Mon, Jul 20 - Fri, Jul 24
Alaska Airlines Logo
5:15 pm - 5:40 am
GTF
-
IAD
10h 25m
1 stop
Alaska Airlines Logo
9:35 am - 4:35 pm
IAD
-
GTF
9h 00m
1 stop
$576Alaska Airlines
Tue, Oct 13 - Sun, Oct 18

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Alaska Airlines flights from Great Falls to Washington, D.C. Dulles Intl Airport

Our best Alaska Airlines deals on Great Falls to Washington, D.C. Dulles Intl Airport flight tickets
Alaska Airlines
Oct 13
GTF5:15 pmGreat Falls
10h 25m
1 stop
IAD5:40 amWashington, D.C. Dulles Intl
Oct 18
IAD9:35 amWashington, D.C. Dulles Intl
9h 00m
1 stop
GTF4:35 pmGreat Falls
$576
Alaska Airlines
Oct 14
GTF5:15 pmGreat Falls
10h 25m
1 stop
IAD5:40 amWashington, D.C. Dulles Intl
Oct 18
IAD7:24 pmWashington, D.C. Dulles Intl
23h 11m
2 stops
GTF4:35 pmGreat Falls
$601
Alaska Airlines
Oct 14
GTF5:15 pmGreat Falls
10h 25m
1 stop
IAD5:40 amWashington, D.C. Dulles Intl
Oct 18
IAD5:33 pmWashington, D.C. Dulles Intl
25h 02m
1 stop
GTF4:35 pmGreat Falls
$603

United Airlines flights from Great Falls to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Great Falls to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
Jul 11
GTF6:15 amGreat Falls
7h 38m
1 stop
IAD3:53 pmWashington, D.C. Dulles Intl
Jul 13
IAD6:30 amWashington, D.C. Dulles Intl
9h 11m
1 stop
GTF1:41 pmGreat Falls
$747
United Airlines
Jul 22
GTF6:15 amGreat Falls
21h 12m
1 stop
IAD5:27 amWashington, D.C. Dulles Intl
Jul 27
IAD6:30 amWashington, D.C. Dulles Intl
9h 11m
1 stop
GTF1:41 pmGreat Falls
$793
United Airlines
Jul 22
GTF2:37 pmGreat Falls
23h 55m
2 stops
IAD4:32 pmWashington, D.C. Dulles Intl
Jul 27
IAD8:15 amWashington, D.C. Dulles Intl
15h 19m
2 stops
GTF9:34 pmGreat Falls
$825

momondo Fare Finder

 
Customize your flight search to find flights from Great Falls to Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated July 3, 2026.
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

Cheapest round-trip
Quickest round-trip

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 10/20

1:13 pm-11:35 pm

1 stop8h 22m

Washington, D.C. Dulles Intl

Sat 10/24

7:00 am-12:33 pm

1 stop7h 33m

$338

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 10/20

1:13 pm-11:35 pm

1 stop8h 22m

Washington, D.C. Dulles Intl

Sat 10/24

6:00 am-5:42 pm

2 stops13h 42m

$344

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 10/20

1:13 pm-11:35 pm

1 stop8h 22m

Washington, D.C. Dulles Intl

Sat 10/24

7:00 am-12:33 pm

1 stop7h 33m

$363

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 10/20

1:13 pm-11:35 pm

1 stop8h 22m

Washington, D.C. Dulles Intl

Sat 10/24

6:00 am-5:42 pm

2 stops13h 42m

$369

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 10/20

5:40 am-6:19 pm

2 stops10h 39m

Washington, D.C. Dulles Intl

Sat 10/24

6:00 am-5:42 pm

2 stops13h 42m

$414

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 10/20

1:13 pm-11:35 pm

1 stop8h 22m

Washington, D.C. Dulles Intl

Sat 10/24

6:00 am-5:42 pm

2 stops13h 42m

$439

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 10/20

6:18 pm-9:12 am

2 stops12h 54m

Washington, D.C. Dulles Intl

Sat 10/24

6:00 am-5:42 pm

2 stops13h 42m

$442

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 10/20

5:40 am-5:17 pm

2 stops9h 37m

Washington, D.C. Dulles Intl

Sat 10/24

6:00 am-5:42 pm

2 stops13h 42m

$529

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Mon 7/20

10:19 am-8:20 am

1 stop20h 01m

Washington, D.C. Dulles Intl

Fri 7/24

8:33 pm-8:20 pm

2 stops49h 47m

$555

Great FallsWashington, D.C.

GTF - IAD

GTFIAD

Great Falls

Tue 10/13

5:15 pm-5:40 am

1 stop10h 25m

Washington, D.C. Dulles Intl

Sun 10/18

9:35 am-4:35 pm

1 stop9h 00m

$576

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Great Falls to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on Great Falls to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 3% on your flight if you consider stops on a Great Falls to Washington, D.C. Dulles Intl Airport flight.

When to book flights from Great Falls to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Great Falls to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Great Falls to Washington, D.C. Dulles Intl Airport (GTF to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Great Falls to Washington, D.C. Dulles Intl Airport

Fastest flight time

6h 48m

Direct flights

None
The fastest flight from Great Falls to Washington, D.C. Dulles Intl Airport takes 6h 48m
There are no direct flights from Great Falls to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from Great Falls to Washington, D.C. Dulles Intl Airport.
Search flight deals

Frequently asked questions about flying from Great Falls to Washington, D.C. Dulles Intl Airport

  • How far is Great Falls to Washington, D.C. Dulles Intl by plane?

    The straight-line distance from Great Falls to Washington, D.C. Dulles Intl is 1785.9 mi. A reasonable flight in good conditions will take 6h 48m.

  • When did momondo last update prices for flights from Great Falls Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Great Falls Airport to Washington, D.C. Dulles Intl Airport were last updated today.

  • How old do you have to be to fly from Great Falls Airport to Washington, D.C. Dulles Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Great Falls Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Arlington
Gettysburg
Winchester
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Colonial Beach
Towson
Manassas
Silver Spring
Sterling
Tysons
Springfield
Bethesda

Why use momondo?

Why should I use momondo to find a flight deal from Great Falls to Washington, D.C.?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from Great Falls.

Can I find flights from Great Falls to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Washington, D.C. from Great Falls with this policy.

How can momondo help me find flights from Great Falls to Washington, D.C.?

Once you have performed a search for Great Falls to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Great Falls to Washington, D.C. right now. Can momondo alert me if prices change?

Price alerts on flights to Washington, D.C. from Great Falls are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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