Cheap flights from St. Louis to Great Falls from $315
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Great Falls departing on 8/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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United Airlines flights from St. Louis to Great Falls
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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
What is the typical price of a round-trip flight between St. Louis and Great Falls?
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
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
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 28m.
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 July 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 | ||
|---|---|---|---|---|---|
| PriceFrom $302 | Free Cancellation | Rating 7.4 8,861 reviews |
Traveling to a place near Great Falls?
Book flights to Great Falls if you plan to visit one of these locationsWhy 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.