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Cheap flights from St. Louis to United States
Round-trip
Economy
Flight information for St. Louis to United States
Find info about flight duration, direct flights, and airports for your flight from St. Louis to United States
| Best Price Found | $55 | The best flight deal from St. Louis to United States found on momondo in the last 72 hours is $55 |
| Fastest flight time | 1h 19m | The fastest flight from St. Louis to United States takes 1h 19m. |
| Direct flights | None | There are no direct flights from St. Louis to United States. Popular non-direct routes for this connection are Lambert-St Louis - Las Vegas McCarran, Lambert-St Louis - Miami and Lambert-St Louis - Phoenix Sky Harbor Intl. |
Easily compare round-trip flights from St. Louis to United States
Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from St. Louis to United States by changing tabs
Frontier![Frontier]()
![Frontier]()
Mar 3
9:35 amLambert-St Louis
2h 28m
12:03 pm
Denver Intl
Mar 4
11:54 amDenver Intl
1h 57m
1:51 pm
Lambert-St Louis
Frontier![Frontier]()
![Frontier]()
Mar 3
9:35 amLambert-St Louis
2h 28m
12:03 pm
Denver Intl
Mar 4
11:54 amDenver Intl
1h 57m
1:51 pm
Lambert-St Louis
Find the cheapest one-way flights from St. Louis to United States
If you're looking for one-way flights from St. Louis to United States, view some of our deals below provided by Frontier
Best airlines flying from St. Louis to United States
Compare and see reviews for airlines that fly from St. Louis to United States with momondo
AirlineFree CancellationPrice
PriceFrom $67
Free Cancellation
Reviews
Pros: It was meh....
Cons: I got no notification that the flight was going to be 1 hour earlier
1 / 6
PriceFrom $77
Free Cancellation
PriceFrom $92
Free Cancellation
Reviews
Pros: Entertainment
Cons: The seat space/leg room is tiny. I found it impossible to fall asleep, being in the middle of a row of three with two "big" people in either side.
1 / 8
PriceFrom $99
Free Cancellation
Reviews
Pros: I appreciate the choice of snacks.
Cons: The coffee served on the flight was lukewarm.
1 / 9
PriceFrom $104
Free Cancellation
PriceFrom $139
Free Cancellation
Reviews
Pros: Yeah
1 / 4
PriceFrom $184
Free Cancellation
Which airlines flying from Lambert-St Louis to United States have COVID-19 safety policies in place?
Alaska Airlines and Delta have implemented additional safety measures to accommodate travelers. Many airlines flying from Lambert-St Louis to United States are offering enhanced cleaning of their aircraft. Additional policies include pre-flight testing for COVID-19-related symptoms and antibodies. Masks are also required and are provided to travelers. Some airlines are offering socially-distanced seating for a limited time. Policies will vary by airline so keep this in mind as you search for options.
Are airlines flying from Lambert-St Louis to United States offering flexible cancellation due to COVID-19?
Due to the global impact of COVID-19, some of our airline partners operating flights from Lambert-St Louis to United States, such as Frontier, American Airlines, and United Airlines may have put in place flexible cancellation policies. Use our site to search for all of the airlines offering this flexibility to you.
Alternative routes for St. Louis to United States
Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
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Useful information for finding St. Louis to United States flight deals
Learn about all of the flight booking features offered by momondo for free.
How do I get Price Alerts for flights from St. Louis to United States?
You can take advantage of momondo’s Price Alerts by first searching for your flights to St. Louis from United States. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.
How can I save money on flights from St. Louis to United States with momondo?
Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.
How does momondo find its flight prices?
We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.