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

United Airlines is the most popular carrier 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 are 2 operators available for flights from Lambert-St Louis Airport to Great Falls Airport as of June 2026.

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.

$318 Cheap Flights from St. Louis to Great Falls in 2026

Q: What is the typical price of a round-trip flight between St. Louis and Great Falls?

Prices are currently low for flights on this route. Typical prices usually range from $470 to $686. The lowest price recently found on this route was $318.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Great Falls

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:30 am - 12:27 pm

STL

GTF

5h 57m

1 stop

5:30 am - 1:23 pm

GTF

STL

6h 53m

1 stop

$318Delta

Thu, Nov 26 - Tue, Dec 8

9:00 am - 10:53 pm

STL

GTF

14h 53m

2 stops

6:20 pm - 12:36 am

GTF

STL

5h 16m

1 stop

$324Delta

Sat, Nov 21 - Mon, Dec 7

9:00 am - 10:53 pm

STL

GTF

14h 53m

2 stops

6:20 pm - 8:12 am

GTF

STL

12h 52m

2 stops

$329Delta

Sat, Nov 21 - Mon, Dec 7

7:30 am - 12:27 pm

STL

GTF

5h 57m

1 stop

5:30 am - 1:23 pm

GTF

STL

6h 53m

1 stop

$343Delta

Mon, Nov 23 - Mon, Dec 7

7:30 am - 12:27 pm

STL

GTF

5h 57m

1 stop

5:30 am - 4:54 pm

GTF

STL

10h 24m

2 stops

$349Delta

Fri, Nov 27 - Tue, Dec 8

4:40 pm - 9:12 pm

STL

GTF

5h 32m

1 stop

2:25 pm - 8:46 pm

GTF

STL

5h 21m

1 stop

$375United Airlines

Tue, Aug 18 - Tue, Aug 25

7:36 pm - 4:38 pm

STL

GTF

22h 02m

1 stop

5:18 pm - 10:59 pm

GTF

STL

28h 41m

2 stops

$385Alaska Airlines

Mon, Aug 24 - Sat, Aug 29

4:40 pm - 9:47 pm

STL

GTF

6h 07m

1 stop

6:30 am - 12:37 pm

GTF

STL

5h 07m

1 stop

$408United Airlines

Tue, Oct 27 - Sat, Oct 31

4:40 pm - 9:12 pm

STL

GTF

5h 32m

1 stop

6:15 am - 3:38 pm

GTF

STL

8h 23m

2 stops

$411United Airlines

Tue, Aug 18 - Tue, Aug 25

1:08 pm - 9:47 pm

STL

GTF

9h 39m

2 stops

6:30 am - 12:37 pm

GTF

STL

5h 07m

1 stop

$414United Airlines

Tue, Oct 27 - Sat, Oct 31

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United Airlines flights from St. Louis to Great Falls

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

United Airlines

Aug 18

STL4:40 pmLambert-St Louis

5h 32m

1 stop

GTF9:12 pmGreat Falls

Aug 25

GTF2:25 pmGreat Falls

5h 21m

1 stop

STL8:46 pmLambert-St Louis

$375

United Airlines

Oct 27

STL4:40 pmLambert-St Louis

6h 07m

1 stop

GTF9:47 pmGreat Falls

Oct 31

GTF6:30 amGreat Falls

5h 07m

1 stop

STL12:37 pmLambert-St Louis

$408

United Airlines

Aug 18

STL4:40 pmLambert-St Louis

5h 32m

1 stop

GTF9:12 pmGreat Falls

Aug 25

GTF6:15 amGreat Falls

8h 23m

2 stops

STL3:38 pmLambert-St Louis

$411

Alaska Airlines flights from St. Louis to Great Falls

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

Alaska Airlines

Aug 24

STL7:36 pmLambert-St Louis

22h 02m

1 stop

GTF4:38 pmGreat Falls

Aug 29

GTF5:18 pmGreat Falls

28h 41m

2 stops

STL10:59 pmLambert-St Louis

$385

Alaska Airlines

Aug 24

STL12:55 pmLambert-St Louis

28h 43m

2 stops

GTF4:38 pmGreat Falls

Aug 29

GTF5:18 pmGreat Falls

28h 41m

2 stops

STL10:59 pmLambert-St Louis

$429

Alaska Airlines

Aug 24

STL7:36 pmLambert-St Louis

22h 02m

1 stop

GTF4:38 pmGreat Falls

Aug 29

GTF5:18 pmGreat Falls

29h 41m

1 stop

STL11:59 pmLambert-St Louis

$490

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 11/26

7:30 am-12:27 pm

1 stop5h 57m

Great Falls

Tue 12/8

5:30 am-1:23 pm

1 stop6h 53m

$318

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 11/21

9:00 am-10:53 pm

2 stops14h 53m

Great Falls

Mon 12/7

6:20 pm-12:36 am

1 stop5h 16m

$324

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 11/21

9:00 am-10:53 pm

2 stops14h 53m

Great Falls

Mon 12/7

6:20 pm-8:12 am

2 stops12h 52m

$329

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Mon 11/23

7:30 am-12:27 pm

1 stop5h 57m

Great Falls

Mon 12/7

5:30 am-1:23 pm

1 stop6h 53m

$343

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 11/27

7:30 am-12:27 pm

1 stop5h 57m

Great Falls

Tue 12/8

5:30 am-4:54 pm

2 stops10h 24m

$349

Quickest round-trip

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 8/18

4:40 pm-9:12 pm

1 stop5h 32m

Great Falls

Tue 8/25

2:25 pm-8:46 pm

1 stop5h 21m

$375

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Mon 8/24

7:36 pm-4:38 pm

1 stop22h 02m

Great Falls

Sat 8/29

5:18 pm-10:59 pm

2 stops28h 41m

$385

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 10/27

4:40 pm-9:47 pm

1 stop6h 07m

Great Falls

Sat 10/31

6:30 am-12:37 pm

1 stop5h 07m

$408

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 8/18

4:40 pm-9:12 pm

1 stop5h 32m

Great Falls

Tue 8/25

6:15 am-3:38 pm

2 stops8h 23m

$411

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 10/27

1:08 pm-9:47 pm

2 stops9h 39m

Great Falls

Sat 10/31

6:30 am-12:37 pm

1 stop5h 07m

$414

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 typical price of a round-trip flight between St. Louis and Great Falls?

What is the cheapest month to fly to Great Falls?

The month of January is another great option to travel to Great Falls, with average flight prices from St. Louis averaging around $0.

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

Fastest flight time	5h 32m
Direct flights	None

The fastest flight from St. Louis to Great Falls takes 5h 32m

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

Frequently asked questions about flying from St. Louis to Great Falls

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 5h 32m.
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 are 2 operators available for flights from Lambert-St Louis Airport to Great Falls Airport as of June 2026.
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 64% of the total bookings. Other popular airlines include Delta with 36%.

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
Delta	PriceFrom $261	Free Cancellation	Rating 7.8 8,432 reviews		Search Delta flights
United Airlines	PriceFrom $293	Free Cancellation	Rating 7.4 9,881 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.