How do I get Price Alerts for flights from St. Louis to Great Falls?

Search flight deals from St. Louis to Great Falls . While viewing offers you’ll have the option to create a Price Alert.

How can I save money on flights from St. Louis to Great Falls with momondo?

By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

How does momondo find its flight prices?

We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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 March 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.

$338 Cheap Flights from St. Louis to Great Falls in 2026

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Find the cheapest flights from St. Louis to Great Falls

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:48 pm - 9:34 pm

STL

GTF

5h 46m

1 stop

2:31 pm - 8:39 pm

GTF

STL

5h 08m

1 stop

$338United Airlines

Tue, Aug 4 - Thu, Aug 13

10:19 am - 10:26 pm

STL

GTF

13h 07m

2 stops

6:19 pm - 12:30 am

GTF

STL

5h 11m

1 stop

$344Delta

Fri, May 29 - Wed, Jun 3

4:48 pm - 9:34 pm

STL

GTF

5h 46m

1 stop

2:31 pm - 8:39 pm

GTF

STL

5h 08m

1 stop

$350United Airlines

Mon, Aug 3 - Thu, Aug 13

7:15 am - 12:24 pm

STL

GTF

6h 09m

1 stop

6:22 pm - 12:21 am

GTF

STL

4h 59m

1 stop

$388Delta

Wed, Apr 8 - Sun, Apr 12

6:00 am - 5:42 pm

STL

GTF

12h 42m

2 stops

6:22 pm - 12:21 am

GTF

STL

4h 59m

1 stop

$394Delta

Wed, Apr 8 - Sun, Apr 12

10:51 am - 10:38 pm

STL

GTF

12h 47m

2 stops

6:20 pm - 12:36 am

GTF

STL

5h 16m

1 stop

$399Delta

Tue, Aug 4 - Thu, Aug 13

10:19 am - 10:26 pm

STL

GTF

13h 07m

2 stops

6:19 pm - 8:18 am

GTF

STL

12h 59m

2 stops

$404Delta

Fri, May 29 - Wed, Jun 3

8:00 am - 12:33 pm

STL

GTF

5h 33m

1 stop

6:20 pm - 12:36 am

GTF

STL

5h 16m

1 stop

$417Delta

Tue, Aug 4 - Thu, Aug 13

4:48 pm - 9:34 pm

STL

GTF

5h 46m

1 stop

2:37 pm - 8:43 pm

GTF

STL

5h 06m

1 stop

$423United Airlines

Fri, May 29 - Wed, Jun 3

8:54 am - 1:31 pm

STL

GTF

5h 37m

1 stop

2:35 pm - 8:43 pm

GTF

STL

5h 08m

1 stop

$428United Airlines

Wed, Apr 29 - Sat, May 2

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 4

STL4:48 pmLambert-St Louis

5h 46m

1 stop

GTF9:34 pmGreat Falls

Aug 13

GTF2:31 pmGreat Falls

5h 08m

1 stop

STL8:39 pmLambert-St Louis

$338

United Airlines

Aug 3

STL4:48 pmLambert-St Louis

5h 46m

1 stop

GTF9:34 pmGreat Falls

Aug 13

GTF2:31 pmGreat Falls

5h 08m

1 stop

STL8:39 pmLambert-St Louis

$350

United Airlines

May 29

STL4:48 pmLambert-St Louis

5h 46m

1 stop

GTF9:34 pmGreat Falls

Jun 3

GTF2:37 pmGreat Falls

5h 06m

1 stop

STL8:43 pmLambert-St Louis

$423

Delta flights from St. Louis to Great Falls

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

Delta

May 29

STL10:19 amLambert-St Louis

13h 07m

2 stops

GTF10:26 pmGreat Falls

Jun 3

GTF6:19 pmGreat Falls

5h 11m

1 stop

STL12:30 amLambert-St Louis

$344

Delta

Apr 8

STL7:15 amLambert-St Louis

6h 09m

1 stop

GTF12:24 pmGreat Falls

Apr 12

GTF6:22 pmGreat Falls

4h 59m

1 stop

STL12:21 amLambert-St Louis

$388

Delta

Apr 8

STL6:00 amLambert-St Louis

12h 42m

2 stops

GTF5:42 pmGreat Falls

Apr 12

GTF6:22 pmGreat Falls

4h 59m

1 stop

STL12:21 amLambert-St Louis

$394

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 8/4

4:48 pm-9:34 pm

1 stop5h 46m

Great Falls

Thu 8/13

2:31 pm-8:39 pm

1 stop5h 08m

$338

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 5/29

10:19 am-10:26 pm

2 stops13h 07m

Great Falls

Wed 6/3

6:19 pm-12:30 am

1 stop5h 11m

$344

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Mon 8/3

4:48 pm-9:34 pm

1 stop5h 46m

Great Falls

Thu 8/13

2:31 pm-8:39 pm

1 stop5h 08m

$350

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 4/8

7:15 am-12:24 pm

1 stop6h 09m

Great Falls

Sun 4/12

6:22 pm-12:21 am

1 stop4h 59m

$388

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 4/8

6:00 am-5:42 pm

2 stops12h 42m

Great Falls

Sun 4/12

6:22 pm-12:21 am

1 stop4h 59m

$394

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 8/4

10:51 am-10:38 pm

2 stops12h 47m

Great Falls

Thu 8/13

6:20 pm-12:36 am

1 stop5h 16m

$399

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 5/29

10:19 am-10:26 pm

2 stops13h 07m

Great Falls

Wed 6/3

6:19 pm-8:18 am

2 stops12h 59m

$404

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 8/4

8:00 am-12:33 pm

1 stop5h 33m

Great Falls

Thu 8/13

6:20 pm-12:36 am

1 stop5h 16m

$417

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 5/29

4:48 pm-9:34 pm

1 stop5h 46m

Great Falls

Wed 6/3

2:37 pm-8:43 pm

1 stop5h 06m

$423

Quickest round-trip

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 4/29

8:54 am-1:31 pm

1 stop5h 37m

Great Falls

Sat 5/2

2:35 pm-8:43 pm

1 stop5h 08m

$428

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 46m
Direct flights	None

The fastest flight from St. Louis to Great Falls takes 5h 46m

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 5h 46m.
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 March 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 66% of the total bookings. Other popular airlines include Delta with 34%.

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 8,320 reviews		Search Delta flights
United Airlines	PriceFrom $246	Free Cancellation	Rating 7.4 9,469 reviews		Search United Airlines flights

How do I get Price Alerts for flights from St. Louis to Great Falls?
Search flight deals from St. Louis to Great Falls. While viewing offers you’ll have the option to create a Price Alert.
How can I save money on flights from St. Louis to Great Falls with momondo?
By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.
How does momondo find its flight prices?
We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Shelby

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.