CA $415 Cheap Flights from Great Falls (GTF) to St. Louis (STL)

View CA $415 flight on Fri, Jun 26, 2026Opens in a new window

Popular airlines from Great Falls, MT (GTF-Great Falls Intl.) to Lambert-St. Louis International Airport (STL)

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

Prices were available within the past 7 days and start at CA $415 for one-way flights and CA $505 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Jun 27 - Sat, Jul 4
GTF
Great Falls
STL
St. Louis
CA $505 Roundtrip, found 5 days ago
CA $505
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Jun 27 from Great Falls to St. Louis, returning Sat, Jul 4, priced at CA $505 found 5 days ago
Delta
Wed, Jun 24 - Sat, Jul 4
GTF
Great Falls
STL
St. Louis
CA $513 Roundtrip, found 5 days ago
CA $513
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Jun 24 from Great Falls to St. Louis, returning Sat, Jul 4, priced at CA $513 found 5 days ago
Delta
Tue, Jun 23 - Sat, Jul 4
GTF
Great Falls
STL
St. Louis
CA $545 Roundtrip, found 5 days ago
CA $545
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Jun 23 from Great Falls to St. Louis, returning Sat, Jul 4, priced at CA $545 found 5 days ago
Delta
Mon, Jun 29 - Sat, Jul 4
GTF
Great Falls
STL
St. Louis
CA $593 Roundtrip, found 5 days ago
CA $593
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, Jun 29 from Great Falls to St. Louis, returning Sat, Jul 4, priced at CA $593 found 5 days ago
United
Sat, Jun 27 - Mon, Jun 29
GTF
Great Falls
STL
St. Louis
CA $596 Roundtrip, found 5 days ago
CA $596
Roundtrip
found 5 days ago
Select United flight, departing Sat, Jun 27 from Great Falls to St. Louis, returning Mon, Jun 29, priced at CA $596 found 5 days ago
Delta
Thu, Jun 25 - Sat, Jul 4
GTF
Great Falls
STL
St. Louis
CA $597 Roundtrip, found 5 days ago
CA $597
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Jun 25 from Great Falls to St. Louis, returning Sat, Jul 4, priced at CA $597 found 5 days ago
Delta
Fri, Jun 26 - Sat, Jul 4
GTF
Great Falls
STL
St. Louis
CA $665 Roundtrip, found 5 days ago
CA $665
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Jun 26 from Great Falls to St. Louis, returning Sat, Jul 4, priced at CA $665 found 5 days ago
Delta
Sat, Jun 27 - Mon, Jul 6
GTF
Great Falls
STL
St. Louis
CA $673 Roundtrip, found 5 days ago
CA $673
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Jun 27 from Great Falls to St. Louis, returning Mon, Jul 6, priced at CA $673 found 5 days ago
Delta
Wed, Jun 24 - Mon, Jul 6
GTF
Great Falls
STL
St. Louis
CA $680 Roundtrip, found 5 days ago
CA $680
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Jun 24 from Great Falls to St. Louis, returning Mon, Jul 6, priced at CA $680 found 5 days ago
Alaska Airlines
Thu, May 21 - Mon, Jun 8
GTF
Great Falls
STL
St. Louis
CA $1,342 Roundtrip, found 1 day ago
CA $1,342
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, May 21 from Great Falls to St. Louis, returning Mon, Jun 8, priced at CA $1,342 found 1 day ago

Frequently asked questions

How much is a flight from Great Falls Intl. Airport to STL?
If you're planning on travelling between GTF and Lambert Field, round-trip flights start from CA $505. This figure is based on airfares available within the last 7 days on Expedia for flights departing within the next year, so don't hang around. Book today and save yourself money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from GTF to Lambert Field?
This can vary between airlines, as each has its own set of terms and conditions. Head to the Customer Service Portal, where you'll find easy-to-follow instructions on how to cancel online.
How do I find cheap flights from GTF to Lambert Field that have flexible change policies?
Select our "No change fees" filter to find flexible travel options for your flight from Great Falls Intl. Airport to Lambert Field. This allows you to lock in a great deal ahead of time and still have the freedom to make changes without any additional fees. Keep in mind that you'll need to cover the fare difference.
How many hours is the flight from Great Falls Intl. Airport (GTF) to Lambert-St. Louis Intl. Airport (STL)?
There are lots of ways to make the 4 hours and 39 minutes between Great Falls Intl. Airport and Lambert-St. Louis Intl. Airport (STL) go by quicker. If you want to be productive, sort through your photos or clear out all those unwanted emails. A nice snooze also helps pass the time!
How far is the flight from Great Falls Intl. Airport (GTF) to Lambert Field?
Around 1,950 kilometres separates Great Falls and St. Louis, so pack some entertainment to help you while away a few hours. That juicy novel you've yet to start will be just the ticket.
Which airlines fly direct from GTF to STL?
At the moment, no airlines offer flights directly from GTF to Lambert Field. You'll need to book a flight with at least one stop. To get the best connections and price, lock in your fare well ahead of time.
Are GTF to Lambert Field flight tickets cheaper when they're purchased at the last minute?
Flight prices are always on the move, so there are no guarantees. While last-minute deals between Great Falls Intl. Airport and STL are possible, it's also a good idea to monitor prices well before you fly. In fact, some carriers publicize their prices up to a year prior to the departure date. Expedia is constantly updating the best airfare bargains around, so keep checking and be ready to pounce when the price dips.

Travel information

Origin airport
Great Falls Intl.
Destination airport
Lambert-St. Louis Intl.
Roundtrip price
CA $505
Distance
1940 km

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