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

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 are 2 operators available for flights from Lambert-St Louis Airport to Great Falls Airport as of May 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.

$165 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 $456 to $324. The lowest price recently found on this route was $318.

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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.

4:40 pm - 9:28 pm

STL

GTF

5h 48m

1 stop

2:31 pm - 8:39 pm

GTF

STL

5h 08m

1 stop

$318United Airlines

Wed, Sep 2 - Sat, Sep 5

2:10 pm - 10:48 pm

STL

GTF

9h 38m

2 stops

6:28 pm - 12:41 am

GTF

STL

5h 13m

1 stop

$324Delta

Fri, Aug 14 - Mon, Aug 17

9:06 pm - 9:28 am

STL

GTF

13h 22m

1 stop

10:18 am - 7:23 pm

GTF

STL

32h 05m

2 stops

$329Multiple Airlines

Thu, Jun 4 - Mon, Jun 8

8:50 am - 5:39 pm

STL

GTF

9h 49m

2 stops

5:30 am - 2:31 pm

GTF

STL

8h 01m

2 stops

$339Delta

Wed, Sep 2 - Sat, Sep 5

5:00 pm - 10:26 pm

STL

GTF

6h 26m

1 stop

6:25 pm - 12:43 am

GTF

STL

5h 18m

1 stop

$343Delta

Sat, Jun 6 - Fri, Jun 12

2:10 pm - 10:48 pm

STL

GTF

9h 38m

2 stops

6:28 pm - 12:41 am

GTF

STL

5h 13m

1 stop

$359Delta

Fri, Aug 14 - Thu, Aug 20

2:10 pm - 10:48 pm

STL

GTF

9h 38m

2 stops

5:40 am - 4:52 pm

GTF

STL

10h 12m

2 stops

$364Delta

Fri, Aug 14 - Thu, Aug 20

9:06 pm - 9:34 am

STL

GTF

13h 28m

1 stop

9:05 pm - 6:34 pm

GTF

STL

44h 29m

2 stops

$375Multiple Airlines

Sun, May 31 - Sun, Jun 7

5:00 pm - 10:43 pm

STL

GTF

6h 43m

1 stop

7:06 am - 1:34 pm

GTF

STL

5h 28m

1 stop

$383Delta

Sat, Aug 15 - Sat, Aug 22

9:06 pm - 9:28 am

STL

GTF

13h 22m

1 stop

10:18 am - 8:11 pm

GTF

STL

8h 53m

1 stop

$387Multiple Airlines

Thu, Jun 4 - Mon, Jun 8

United Airlines flights from St. Louis to Great Falls

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

United Airlines

Sep 2

STL4:40 pmLambert-St Louis

5h 48m

1 stop

GTF9:28 pmGreat Falls

Sep 5

GTF2:31 pmGreat Falls

5h 08m

1 stop

STL8:39 pmLambert-St Louis

$318

United Airlines

May 20

STL2:35 pmLambert-St Louis

7h 43m

1 stop

GTF9:18 pmGreat Falls

May 24

GTF2:37 pmGreat Falls

5h 33m

1 stop

STL9:10 pmLambert-St Louis

$388

United Airlines

Jun 3

STL4:48 pmLambert-St Louis

5h 46m

1 stop

GTF9:34 pmGreat Falls

Jun 8

GTF2:37 pmGreat Falls

5h 33m

1 stop

STL9:10 pmLambert-St Louis

$436

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 14

STL7:56 pmLambert-St Louis

21h 33m

1 stop

GTF4:29 pmGreat Falls

Aug 20

GTF5:18 pmGreat Falls

19h 46m

1 stop

STL2:04 pmLambert-St Louis

$418

Alaska Airlines

Aug 14

STL6:02 amLambert-St Louis

11h 27m

1 stop

GTF4:29 pmGreat Falls

Aug 20

GTF5:18 pmGreat Falls

19h 46m

1 stop

STL2:04 pmLambert-St Louis

$462

Alaska Airlines

Sep 8

STL3:17 pmLambert-St Louis

26h 22m

1 stop

GTF4:39 pmGreat Falls

Sep 12

GTF5:19 pmGreat Falls

15h 08m

2 stops

STL9:27 amLambert-St Louis

$465

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 9/2

4:40 pm-9:28 pm

1 stop5h 48m

Great Falls

Sat 9/5

2:31 pm-8:39 pm

1 stop5h 08m

$318

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 8/14

2:10 pm-10:48 pm

2 stops9h 38m

Great Falls

Mon 8/17

6:28 pm-12:41 am

1 stop5h 13m

$324

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 6/4

9:06 pm-9:28 am

1 stop13h 22m

Great Falls

Mon 6/8

10:18 am-7:23 pm

2 stops32h 05m

$329

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 9/2

8:50 am-5:39 pm

2 stops9h 49m

Great Falls

Sat 9/5

5:30 am-2:31 pm

2 stops8h 01m

$339

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 6/6

5:00 pm-10:26 pm

1 stop6h 26m

Great Falls

Fri 6/12

6:25 pm-12:43 am

1 stop5h 18m

$343

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 8/14

2:10 pm-10:48 pm

2 stops9h 38m

Great Falls

Thu 8/20

6:28 pm-12:41 am

1 stop5h 13m

$359

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 8/14

2:10 pm-10:48 pm

2 stops9h 38m

Great Falls

Thu 8/20

5:40 am-4:52 pm

2 stops10h 12m

$364

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sun 5/31

9:06 pm-9:34 am

1 stop13h 28m

Great Falls

Sun 6/7

9:05 pm-6:34 pm

2 stops44h 29m

$375

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 8/15

5:00 pm-10:43 pm

1 stop6h 43m

Great Falls

Sat 8/22

7:06 am-1:34 pm

1 stop5h 28m

$383

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 6/4

9:06 pm-9:28 am

1 stop13h 22m

Great Falls

Mon 6/8

10:18 am-8:11 pm

1 stop8h 53m

$387

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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 41m
Direct flights	None

The fastest flight from St. Louis to Great Falls takes 5h 41m

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 41m.
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 May 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 71% of the total bookings. Other popular airlines include Delta with 29%.

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 $241	Free Cancellation	Rating 7.9 8,456 reviews		Search Delta flights
United Airlines	PriceFrom $293	Free Cancellation	Rating 7.4 9,694 reviews		Search United Airlines flights

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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.