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$372+ 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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
STL — GTF
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap 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 December 4, 2025.

This Alaska Airlines deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/167:00 amSTL - GTF
1 stop12h 55mAlaska Airlines
Fri 1/27:21 pmGTF - STL
1 stop27h 29mAlaska Airlines
Deal found 12/4$695
This United Airlines deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/169:00 amSTL - GTF
1 stop5h 39mUnited Airlines
Fri 1/22:35 pmGTF - STL
1 stop6h 47mUnited Airlines
Deal found 12/2$752
This Alaska Airlines deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:55 amSTL - GTF
2 stops13h 00mAlaska Airlines
Wed 12/107:35 pmGTF - STL
1 stop17h 52mAlaska Airlines
Deal found 12/3$811
This United Airlines deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/94:37 pmSTL - GTF
1 stop5h 55mUnited Airlines
Wed 12/102:35 pmGTF - STL
1 stop5h 22mUnited Airlines
Deal found 12/3$912
This Delta deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1612:49 pmSTL - GTF
2 stops10h 41mDelta
Fri 1/25:30 amGTF - STL
2 stops11h 47mDelta
Deal found 12/2$1,534

Find flight deals from St. Louis to Great Falls

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Great Falls (GTF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$372
(Alaska Airlines)
Provider with most accurate pricing for Lambert-St Louis-Great Falls flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Great Falls flights.
Search Deals
From Lambert-St Louis to Great Falls
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Great Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 4, 2025.
Use the filters below to find and compare flights from St. Louis to Great Falls that are best for you.

Fly from

St. Louis

Fly to

Great Falls

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

2:38 pm-10:30 pm

1 stop8h 52m

Great Falls

Wed 2/4

5:25 am-11:25 pm

2 stops17h 00m

$461

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-1:16 pm

1 stop21h 47m

$538

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 12/16

7:00 am-6:55 pm

1 stop12h 55m

Great Falls

Fri 1/2

7:21 pm-11:50 pm

1 stop27h 29m

$695

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 12/16

9:00 am-1:39 pm

1 stop5h 39m

Great Falls

Fri 1/2

2:35 pm-10:22 pm

1 stop6h 47m

$752

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 1/1

7:00 am-6:41 pm

1 stop12h 41m

$373

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 1/1

8:15 am-10:46 pm

2 stops15h 31m

$403

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 1/1

7:20 am-12:31 pm

1 stop6h 11m

$403

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Great Falls flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

Reviews of airlines servicing Great Falls

Get insights into the airlines that provide service to Great Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Great Falls. Reviews last updated December 4, 2025.
Get a feel of what it's like to fly with United Airlines from St. Louis to Great Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,066 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,066 reviews
United Airlines
7.4
Good
9,066 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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.

  • How long is the flight from St. Louis to Great Falls?

    Airlines like Alaska Airlines, Delta, and United Airlines fly from St. Louis to Great Falls in about 8h 52m. The time it takes to get you to your destination can typically vary by up to 15h 08m. Airlines will cover a distance of 1212 mi. This flight may include one or multiple stops.

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

    Flying on United Airlines is currently your cheapest option to Great Falls, with prices starting at $293.

  • 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.

See more FAQs

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Top airline flying from St. Louis to Great Falls

Discover the top airline that operate flights from St. Louis to Great Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$298Average$631FlexibilityNo cancel feeOn-time69%

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