STL - GTF

$139 Find Cheap Flights from St. Louis to Great Falls

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Great Falls departing on 3/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Great Falls

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Great Falls, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Great Falls, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$278
Delta
Wed 3/11Wed 3/18
STL - GTF • 1 stop
Cheapest one-way
$139
Alaska Airlines
Tue 3/3
STL - GTF • 1 stop
Top airlines
Delta
Cheapest • from $278 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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We hope you love your trip to Great Falls!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Great Falls (STL-GTF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Great Falls that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Great Falls

Wed, Mar 11 - Wed, Mar 18
Delta Logo
7:15 am - 12:24 pm
STL
-
GTF
6h 09m
1 stop
Delta Logo
6:22 pm - 12:21 am
GTF
-
STL
4h 59m
1 stop
$278Delta
Wed, Mar 11 - Wed, Mar 18
United Airlines Logo
10:00 am - 9:11 pm
STL
-
GTF
12h 11m
2 stops
United Airlines Logo
2:30 pm - 8:41 pm
GTF
-
STL
5h 11m
1 stop
$284United Airlines
Tue, Apr 28 - Sat, May 2
United Airlines Logo
4:30 pm - 9:17 pm
STL
-
GTF
5h 47m
1 stop
United Airlines Logo
6:15 am - 2:28 pm
GTF
-
STL
7h 13m
1 stop
$303United Airlines
Tue, Apr 28 - Sat, May 2
United Airlines Logo
9:10 am - 9:17 pm
STL
-
GTF
13h 07m
2 stops
United Airlines Logo
6:15 am - 2:28 pm
GTF
-
STL
7h 13m
1 stop
$309United Airlines
Wed, Mar 11 - Wed, Mar 18
United Airlines Logo
10:00 am - 9:11 pm
STL
-
GTF
12h 11m
2 stops
United Airlines Logo
6:15 am - 5:59 pm
GTF
-
STL
10h 44m
2 stops
$349United Airlines
Wed, Mar 4 - Wed, Mar 11
Delta Logo
7:00 am - 12:30 pm
STL
-
GTF
6h 30m
1 stop
Delta Logo
5:30 am - 2:24 pm
GTF
-
STL
7h 54m
2 stops
$369Delta
Wed, Mar 11 - Wed, Mar 18
United Airlines Logo
6:00 am - 1:33 pm
STL
-
GTF
32h 33m
3 stops
United Airlines Logo
2:30 pm - 8:41 pm
GTF
-
STL
5h 11m
1 stop
$461United Airlines
Tue, Apr 28 - Sat, May 2
United Airlines Logo
9:10 am - 9:17 pm
STL
-
GTF
13h 07m
2 stops
United Airlines Logo
2:35 pm - 10:48 am
GTF
-
STL
19h 13m
2 stops
$486United Airlines
Tue, Apr 28 - Sat, May 2
United Airlines Logo
9:10 am - 9:17 pm
STL
-
GTF
13h 07m
2 stops
United Airlines Logo
6:15 am - 10:59 pm
GTF
-
STL
15h 44m
2 stops
$490United Airlines
Wed, Mar 4 - Wed, Mar 11
Alaska Airlines Logo
7:58 am - 4:17 pm
STL
-
GTF
33h 19m
2 stops
Alaska Airlines Logo
6:28 pm - 11:58 pm
GTF
-
STL
28h 30m
2 stops
$507Alaska Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Great Falls flights

Get data-powered insights and trends into flights from St. Louis to Great Falls to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from St. Louis to Great Falls?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Great Falls were found on Delta ($278) and United Airlines ($284).

Find deals

Good to know

Cheapest flight$139
Flight from St. Louis to Great Falls

When to book flights from St. Louis to Great Falls

Are your dates flexible? Find out the best times to travel from St. Louis to Great Falls based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Great Falls

  • What is the cheapest flight from St. Louis to Great Falls?

    In the last 3 days, the lowest price for a flight from St. Louis to Great Falls was $139 for a one-way ticket and $278 for a round-trip.

  • Do I need a passport to fly between St. Louis and Great Falls?

    No, a passport isn't needed to fly from St. Louis to Great Falls. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from St. Louis to Great Falls?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Great Falls?

    Star Alliance is the only airline alliance operating flights between St. Louis and Great Falls.

  • How does KAYAK find such low prices on flights from St. Louis to Great Falls?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Great Falls.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Great Falls?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Great Falls from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Great Falls?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Great Falls with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and GTF can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Great Falls?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Great Falls from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from St. Louis to Great Falls

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Great Falls. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Great Falls? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9205 reviews
6.6Food
7.3Comfort
8.1Crew
7.1Entertainment
7.7Boarding
Airline reviews

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

2.0 MediocreSonje’, Jan 2026
STL - EWR
Read more United Airlines reviews

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

I wish there were outlets to charge my iPhone. The crew was great; we had a female pilot who was great with explaining what was happening and delays,

The flight crew where really good. Better then the crew from BNE to SFO

Delayed, toilets did not flush, pilot parked to far away from Gate

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

Information on your arrival and departure airports

St. Louis (STL)
Great Falls (GTF)