What are the cheapest airlines flying from St. Louis to Great Falls round-trip?

Flying on Alaska Airlines is currently your cheapest option to Great Falls, with prices starting at $497. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $506 and $525, respectively. Alaska Airlines is 14% cheaper than the average price of flights available within the next 90 days to this destination.

What is the cheapest month to book a flight from St. Louis to Great Falls?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Great Falls (average of $367). Flying from St. Louis to Great Falls in June is currently the most expensive (average of $605). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from St. Louis to Great Falls?

Travelers seeking maximum savings on their St. Louis to Great Falls flight should consider departing on Wednesday mornings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from St. Louis to Great Falls?

Travelers have found that booking a Tuesday departure is the best way to save up to 76% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

What is the cheapest month to fly from St. Louis to Great Falls?

November is one of the best times of the year to fly to Great Falls from St. Louis. Prices for November average $583 per person but you can even find prices for as low as $207. The most expensive prices can be found in the month of December. Opting for a November flight can save you 35% on your journey compared to booking in December

What is the cheapest time of day to fly from STL to GTF?

It’s typically best to fly out from St. Louis to Great Falls in the morning. Doing so could potentially save you 17% on the flight price compared to flying in the afternoon, which is usually more expensive.

Most accurate provider : When it comes to deals on St. Louis-Great Falls flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Great Falls flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Great Falls flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Great Falls flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Great Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from St. Louis to Great Falls that include hotel bookings?

Yes. In addition to deals on St. Louis to Great Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Great Falls?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Great Falls.

Can I find deals for business class flights from St. Louis to Great Falls?

Yes. Cheapflights offers flight deals from St. Louis to Great Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$497+ Flights from St. Louis to Great Falls

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1. Tell us where you want to go

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Cheap flight deals from St. Louis to Great Falls

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$497 (Alaska Airlines)
Popular in	December
Cheapest in	November
Average price	$688

Provider with most accurate pricing for Lambert-St Louis-Great Falls flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Great Falls flights.

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From Lambert-St Louis to Great Falls

Search Deals

High demand for flights, 10% potential price rise

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Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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Find flight deals from St. Louis to Great Falls

Cheapest flights from St. Louis to Great Falls
Explore the most affordable flight options available from St. Louis to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 11, 2025.

lun. 4/283:08 pmSTL - GTF

1 stop27h 19mAlaska Airlines

vie. 5/26:07 pmGTF - STL

1 stop19h 01mAlaska Airlines

Deal found 4/10

$497

vie. 7/45:00 pmSTL - GTF

1 stop6h 41mDelta

vie. 7/116:20 pmGTF - STL

1 stop5h 18mDelta

Deal found 4/10

$506

mar. 6/249:10 amSTL - GTF

1 stop13h 00mUnited Airlines

lun. 6/306:25 amGTF - STL

1 stop14h 25mUnited Airlines

Deal found 4/10

$525

Best flights from St. Louis to Great Falls
Discover carefully curated flight deals from St. Louis to Great Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated abril 11, 2025.

lun. 4/283:08 pmSTL - GTF

1 stop27h 19mAlaska Airlines

vie. 5/26:07 pmGTF - STL

1 stop19h 01mAlaska Airlines

Deal found 4/10

$497

vie. 7/45:00 pmSTL - GTF

1 stop6h 41mDelta

vie. 7/116:20 pmGTF - STL

1 stop5h 18mDelta

Deal found 4/10

$506

mar. 6/249:10 amSTL - GTF

1 stop13h 00mUnited Airlines

lun. 6/306:25 amGTF - STL

1 stop14h 25mUnited Airlines

Deal found 4/10

$525

Last-minute flights from St. Louis to Great Falls
Discover last-minute flight deals from St. Louis to Great Falls. Data last updated abril 11, 2025 and is based on user searches.

lun. 4/144:45 pmSTL - GTF

1 stop5h 30mUnited Airlines

vie. 4/182:20 pmGTF - STL

1 stop6h 30mUnited Airlines

Deal found 4/10

$746

vie. 4/183:11 pmSTL - GTF

1 stop25h 01mAlaska Airlines

lun. 4/213:52 pmGTF - STL

1 stop7h 07mAlaska Airlines

Deal found 4/10

$694

lun. 4/213:12 pmSTL - GTF

1 stop6h 21mDelta

vie. 4/256:35 pmGTF - STL

1 stop5h 07mDelta

Deal found 4/9

$641

lun. 4/283:08 pmSTL - GTF

1 stop27h 19mAlaska Airlines

vie. 5/26:07 pmGTF - STL

1 stop19h 01mAlaska Airlines

Deal found 4/10

$497

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Great Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

lun. 4/28

3:08 pm-5:27 pm

1 stop27h 19m

Great Falls

vie. 5/2

6:07 pm-2:08 pm

1 stop19h 01m

$497

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

vie. 7/4

5:00 pm-10:41 pm

1 stop6h 41m

Great Falls

vie. 7/11

6:20 pm-12:38 am

1 stop5h 18m

$506

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

mar. 6/24

9:10 am-9:10 pm

1 stop13h 00m

Great Falls

lun. 6/30

6:25 am-9:50 pm

1 stop14h 25m

$525

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Compare providers for flights from St. Louis to Great Falls

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Great Falls in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Great Falls flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Great Falls flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Great Falls flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Great Falls flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Great Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Great Falls

Have a flexible travel schedule? Discover the best time to fly to Great Falls from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Great Falls

Rainfall in Great Falls by month

In terms of precipitation, rainfall in Great Falls ranges from 0.5 - 2.5 inches per month. June is typically the wettest month, when rainfall can reach 2.5 in. January is typically the driest time to visit Great Falls when rainfall is around 0.5 in.

Temperature in Great Falls by month

If weather is an important factor for your trip to Great Falls, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 24.8 F).

Reviews of airlines servicing Great Falls

To help decide which airline to fly from St. Louis to Great Falls, see what other customers have to say about Alaska Airlines, Delta and United Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,851 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,910 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,636 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

What are the cheapest airlines flying from St. Louis to Great Falls round-trip?
Flying on Alaska Airlines is currently your cheapest option to Great Falls, with prices starting at $497. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $506 and $525, respectively. Alaska Airlines is 14% cheaper than the average price of flights available within the next 90 days to this destination.
Can I find deals for flights from St. Louis to Great Falls that include hotel bookings?
Yes. In addition to deals on St. Louis to Great Falls flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Great Falls?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Great Falls.
Can I find deals for business class flights from St. Louis to Great Falls?
Yes. Cheapflights offers flight deals from St. Louis to Great Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Great Falls?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Great Falls (average of $367). Flying from St. Louis to Great Falls in June is currently the most expensive (average of $605). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from St. Louis to Great Falls

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$304	Average$506	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$388	Average$692	FlexibilityNo cancel fee	On-time69%

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$497+ Cheap flights from St. Louis to Great Falls (STL - GTF)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/28. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Great Falls with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Great Falls

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Great Falls

Cheapest flights from St. Louis to Great FallsExplore the most affordable flight options available from St. Louis to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 11, 2025.

Explore the most affordable flight options available from St. Louis to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 11, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Great Falls that are best for you.

Compare providers for flights from St. Louis to Great Falls

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Great Falls in April.

Best time to book a flight from St. Louis to Great Falls

Have a flexible travel schedule? Discover the best time to fly to Great Falls from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Great Falls

Rainfall in Great Falls by month

Plan your trip to Great Falls by taking into account the average rainfall totals by month.

Temperature in Great Falls by month

Plan your trip to Great Falls by taking into account the average temperature totals by month.

Reviews of airlines servicing Great Falls

To help decide which airline to fly from St. Louis to Great Falls, see what other customers have to say about Alaska Airlines, Delta and United Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Great Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from St. Louis to Great Falls round-trip?

Can I find deals for flights from St. Louis to Great Falls that include hotel bookings?

How can I find direct flights from St. Louis to Great Falls?

Can I find deals for business class flights from St. Louis to Great Falls?

What is the cheapest month to book a flight from St. Louis to Great Falls?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Great Falls

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from St. Louis to Great Falls

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Book with Flexibility

Travel Smart

Cheapest flights from St. Louis to Great Falls
Explore the most affordable flight options available from St. Louis to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 11, 2025.