What is the cheapest airline that flies from Lambert-St Louis to Great Falls?

Delta, Alaska Airlines, and United Airlines are the most popular carriers operating from Lambert-St Louis to Great Falls

When did momondo last update prices for flights from Lambert-St Louis Airport to Great Falls Airport?

Prices for flights from Lambert-St Louis Airport to Great Falls Airport refresh daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Great Falls Airport?

There is 1 operator available for flights from Lambert-St Louis Airport to Great Falls Airport as of October 2025.

How old do you have to be to fly from Lambert-St Louis Airport to Great Falls Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Great Falls Airport.

What documentation or ID do you need to fly to Great Falls Airport?

The necessary travel and health documents for your Great Falls Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$189 Cheap Flights from St. Louis to Great Falls in 2025/26

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Find the cheapest flights from St. Louis to Great Falls

Round-trip

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 6:55 pmSTL-GTF

12h 55m1 stop

7:21 pm - 11:59 pmGTF-STL

27h 38m1 stop

$362Alaska Airlines

Find Deal

Mon, Dec 15 - Mon, Jan 5

7:00 am - 6:55 pmSTL-GTF

12h 55m1 stop

7:21 pm - 11:59 pmGTF-STL

27h 38m1 stop

$372Alaska Airlines

Find Deal

Sat, Dec 13 - Mon, Jan 5

5:34 pm - 9:35 pmSTL-GTF

29h 01m1 stop

10:25 pm - 10:02 amGTF-STL

34h 37m2 stops

$377Multiple Airlines

Find Deal

Thu, Dec 18 - Mon, Jan 5

6:30 am - 12:31 pmSTL-GTF

7h 01m1 stop

5:30 am - 1:23 pmGTF-STL

6h 53m1 stop

$378Delta

Find Deal

Tue, Dec 16 - Wed, Dec 31

6:30 am - 12:31 pmSTL-GTF

7h 01m1 stop

1:11 pm - 10:16 pmGTF-STL

8h 05m2 stops

$384Delta

Find Deal

Tue, Dec 16 - Wed, Dec 31

6:15 am - 12:31 pmSTL-GTF

7h 16m1 stop

5:30 am - 1:23 pmGTF-STL

6h 53m1 stop

$388Delta

Find Deal

Sun, Dec 14 - Wed, Dec 31

12:49 pm - 10:30 pmSTL-GTF

10h 41m2 stops

1:11 pm - 10:16 pmGTF-STL

8h 05m2 stops

$389Delta

Find Deal

Wed, Dec 17 - Wed, Dec 31

12:49 pm - 10:30 pmSTL-GTF

10h 41m2 stops

1:11 pm - 9:34 pmGTF-STL

7h 23m1 stop

$394Delta

Find Deal

Wed, Dec 17 - Thu, Jan 1

12:28 pm - 9:37 pmSTL-GTF

10h 09m1 stop

10:22 pm - 9:07 amGTF-STL

33h 45m2 stops

$401Multiple Airlines

Find Deal

Fri, Oct 24 - Mon, Oct 27

7:00 am - 6:55 pmSTL-GTF

12h 55m1 stop

7:21 pm - 11:59 pmGTF-STL

27h 38m1 stop

$418Alaska Airlines

Find Deal

Wed, Dec 17 - Mon, Jan 5

Alaska Airlines flights from St. Louis to Great Falls

Our best Alaska Airlines deals on St. Louis to Great Falls flight tickets

Alaska Airlines

Dec 15

STL7:00 amLambert-St Louis

12h 55m

1 stop

GTF6:55 pmGreat Falls

Jan 5

GTF7:21 pmGreat Falls

27h 38m

1 stop

STL11:59 pmLambert-St Louis

$362

Find similar

Alaska Airlines

Dec 13

STL7:00 amLambert-St Louis

12h 55m

1 stop

GTF6:55 pmGreat Falls

Jan 5

GTF7:21 pmGreat Falls

27h 38m

1 stop

STL11:59 pmLambert-St Louis

$372

Find similar

Alaska Airlines

Dec 17

STL7:00 amLambert-St Louis

12h 55m

1 stop

GTF6:55 pmGreat Falls

Jan 5

GTF7:21 pmGreat Falls

27h 38m

1 stop

STL11:59 pmLambert-St Louis

$418

Find similar

Delta flights from St. Louis to Great Falls

Our best Delta deals on St. Louis to Great Falls flight tickets

Delta

Dec 16

STL6:30 amLambert-St Louis

7h 01m

1 stop

GTF12:31 pmGreat Falls

Dec 31

GTF5:30 amGreat Falls

6h 53m

1 stop

STL1:23 pmLambert-St Louis

$378

Find similar

Delta

Dec 16

STL6:30 amLambert-St Louis

7h 01m

1 stop

GTF12:31 pmGreat Falls

Dec 31

GTF1:11 pmGreat Falls

8h 05m

2 stops

STL10:16 pmLambert-St Louis

$384

Find similar

Delta

Dec 14

STL6:15 amLambert-St Louis

7h 16m

1 stop

GTF12:31 pmGreat Falls

Dec 31

GTF5:30 amGreat Falls

6h 53m

1 stop

STL1:23 pmLambert-St Louis

$388

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Mon 12/15

7:00 am-6:55 pm

1 stop12h 55m

Great Falls

Mon 1/5

7:21 pm-11:59 pm

1 stop27h 38m

$362

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 12/13

7:00 am-6:55 pm

1 stop12h 55m

Great Falls

Mon 1/5

7:21 pm-11:59 pm

1 stop27h 38m

$372

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 12/18

5:34 pm-9:35 pm

1 stop29h 01m

Great Falls

Mon 1/5

10:25 pm-10:02 am

2 stops34h 37m

$377

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 12/16

6:30 am-12:31 pm

1 stop7h 01m

Great Falls

Wed 12/31

5:30 am-1:23 pm

1 stop6h 53m

$378

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 12/16

6:30 am-12:31 pm

1 stop7h 01m

Great Falls

Wed 12/31

1:11 pm-10:16 pm

2 stops8h 05m

$384

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sun 12/14

6:15 am-12:31 pm

1 stop7h 16m

Great Falls

Wed 12/31

5:30 am-1:23 pm

1 stop6h 53m

$388

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 12/17

12:49 pm-10:30 pm

2 stops10h 41m

Great Falls

Wed 12/31

1:11 pm-10:16 pm

2 stops8h 05m

$389

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 12/17

12:49 pm-10:30 pm

2 stops10h 41m

Great Falls

Thu 1/1

1:11 pm-9:34 pm

1 stop7h 23m

$394

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 10/24

12:28 pm-9:37 pm

1 stop10h 09m

Great Falls

Mon 10/27

10:22 pm-9:07 am

2 stops33h 45m

$401

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 12/17

7:00 am-6:55 pm

1 stop12h 55m

Great Falls

Mon 1/5

7:21 pm-11:59 pm

1 stop27h 38m

$418

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Great Falls

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

Prices

Airlines

What is the cheapest day to depart on your flight to Great Falls?

The cheapest day to depart on your flight to Great Falls is on a Wednesday when prices can be found for as low as $405. This is often the case because there is less demand to fly during this day of the week. On the other hand, Friday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $714.

What is the cheapest time of day to depart on your flight to Great Falls?

According to our data, the cheapest time of day to fly to Great Falls is in the morning. momondo users have found flights departing from St. Louis to Great Falls in the morning for as low as $538. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $644 on average. Flights to Great Falls from St. Louis in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from St. Louis to Great Falls

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Great Falls according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Great Falls (STL to GTF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Great Falls

Direct flights	None

There are no direct flights from St. Louis to Great Falls. There are no popular flight routes from St. Louis to Great Falls.

Search flight deals

How far is Lambert-St Louis to Great Falls by plane?
The distance between Lambert-St Louis and Great Falls is about 1222.4 mi. A reasonable flight in good conditions will take 7h 01m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Great Falls Airport?
Prices for flights from Lambert-St Louis Airport to Great Falls Airport refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Great Falls Airport?
There is 1 operator available for flights from Lambert-St Louis Airport to Great Falls Airport as of October 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Great Falls Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Great Falls Airport.
What documentation or ID do you need to fly to Great Falls Airport?
The necessary travel and health documents for your Great Falls Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Great Falls?
Based on momondo bookings for flights between St. Louis and Great Falls, the leading airline is United Airlines, making up 100% of the total bookings.

Best airlines flying from St. Louis to Great Falls

Compare and see reviews for airlines that fly from St. Louis to Great Falls with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $298	Free Cancellation	Rating 7.4 8,968 reviews		Search United Airlines flights

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Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Great Falls?

It is quick and easy to find St. Louis to Great Falls flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Great Falls that suits you.

Can I find flights from St. Louis to Great Falls with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Great Falls flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Great Falls?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Great Falls from St. Louis.

I’m not ready to book a flight from St. Louis to Great Falls right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Great Falls now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Great Falls and let you know when they change.