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

$210 Cheap Flights from St. Louis to Great Falls in 2025/26

1 adult

0 bags

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Find the cheapest flights from St. Louis to Great Falls

Round-trip

One-way

Cheap round-trip flights

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6:19 pm - 5:19 pm

STL

GTF

24h 00m1 stop

5:59 pm - 1:54 pm

GTF

STL

18h 55m1 stop

$372Alaska Airlines

Sat, Jan 31 - Wed, Feb 4

6:19 pm - 5:19 pm

STL

GTF

24h 00m1 stop

5:59 pm - 1:54 pm

GTF

STL

18h 55m1 stop

$412Alaska Airlines

Sat, Jan 31 - Wed, Feb 4

8:30 am - 9:43 pm

STL

GTF

14h 13m2 stops

6:41 am - 1:41 pm

GTF

STL

6h 00m1 stop

$552United Airlines

Sat, Jan 31 - Wed, Feb 4

11:20 am - 9:43 pm

STL

GTF

11h 23m2 stops

2:29 pm - 2:30 pm

GTF

STL

23h 01m2 stops

$586United Airlines

Sat, Jan 31 - Wed, Feb 4

6:00 am - 9:43 pm

STL

GTF

16h 43m3 stops

2:29 pm - 2:30 pm

GTF

STL

23h 01m2 stops

$678United Airlines

Sat, Jan 31 - Wed, Feb 4

Alaska Airlines flights from St. Louis to Great Falls

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

Alaska Airlines

Jan 31

STL6:19 pmLambert-St Louis

24h 00m

1 stop

GTF5:19 pmGreat Falls

Feb 4

GTF5:59 pmGreat Falls

18h 55m

1 stop

STL1:54 pmLambert-St Louis

$372

Find similar

Alaska Airlines

Jan 31

STL6:19 pmLambert-St Louis

24h 00m

1 stop

GTF5:19 pmGreat Falls

Feb 4

GTF5:59 pmGreat Falls

18h 55m

1 stop

STL1:54 pmLambert-St Louis

$412

Find similar

United Airlines flights from St. Louis to Great Falls

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

United Airlines

Jan 31

STL8:30 amLambert-St Louis

14h 13m

2 stops

GTF9:43 pmGreat Falls

Feb 4

GTF6:41 amGreat Falls

6h 00m

1 stop

STL1:41 pmLambert-St Louis

$552

Find similar

United Airlines

Jan 31

STL11:20 amLambert-St Louis

11h 23m

2 stops

GTF9:43 pmGreat Falls

Feb 4

GTF2:29 pmGreat Falls

23h 01m

2 stops

STL2:30 pmLambert-St Louis

$586

Find similar

United Airlines

Jan 31

STL6:00 amLambert-St Louis

16h 43m

3 stops

GTF9:43 pmGreat Falls

Feb 4

GTF2:29 pmGreat Falls

23h 01m

2 stops

STL2:30 pmLambert-St Louis

$678

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 1/31

6:19 pm-5:19 pm

1 stop24h 00m

Great Falls

Wed 2/4

5:59 pm-1:54 pm

1 stop18h 55m

$372

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 1/31

6:19 pm-5:19 pm

1 stop24h 00m

Great Falls

Wed 2/4

5:59 pm-1:54 pm

1 stop18h 55m

$412

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 1/31

8:30 am-9:43 pm

2 stops14h 13m

Great Falls

Wed 2/4

6:41 am-1:41 pm

1 stop6h 00m

$552

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 1/31

11:20 am-9:43 pm

2 stops11h 23m

Great Falls

Wed 2/4

2:29 pm-2:30 pm

2 stops23h 01m

$586

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 1/31

6:00 am-9:43 pm

3 stops16h 43m

Great Falls

Wed 2/4

2:29 pm-2:30 pm

2 stops23h 01m

$678

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 1/1

9:00 am-1:39 pm

1 stop5h 39m

$328

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 1/1

8:15 am-10:46 pm

2 stops15h 31m

$334

Flights are sorted by cheapest round-trip flights first.

Sorted 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

Fastest flight time	5h 39m
Direct flights	None

The fastest flight from St. Louis to Great Falls takes 5h 39m

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

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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 39m.
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 December 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 9,095 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.