There are most likely no direct flights on the Saint Louis — Denver route
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We carefully collect statistics on the search and pricing of airlines and, based on these data, we make an assumption about future prices. Thus, you can better understand which season is the cheapest to fly from Saint Louis to Denver
A non-stop flight is the most convenient and comfortable way to fly from Saint Louis to Denver, despite the fact that sometimes flights with transfers can cost significantly less.
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There are most likely no direct flights on the Saint Louis — Denver route
Saint Louis — Denver
06/24/2026
Departure
Direct flight
F94567
starting at $266
Saint Louis — Denver
06/30/2026
Departure
Direct flight
UA1380
starting at $216
starting at $141
starting at $164
The route Saint Louis — Denver is served by several airlines: Frontier Airlines and United Airlines. This gives passengers more freedom in choosing flights. You can consider not only the price but also schedules, baggage policies, and onboard service. Our service compares all offers so you can find tickets from $141 and choose the most convenient option. Thanks to airline competition, you may also find promotional fares or special offers, helping you save even more. Plan your trip in advance and choose the best flights without overpaying.
The cheapest flight ticket from Saint Louis to Denver according to data for the last 48 hours costs $141
Often the best time to buy tickets from Saint Louis to Denver is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Saint Louis to Denver can be found flying in these months: June.
The fastest flights from Saint Louis to Denver start from 2 hours 22 minutes in the air.
The following airlines operate direct flights on the route Saint Louis — Denver: Frontier Airlines, United Airlines
The cheapest one-way flight from Saint Louis to Denver departs on 07/01/2026, is operated by Frontier Airlines and costs $141
The cheapest roundtrip flight from Saint Louis to Denver departs on 10/22/2026, is operated by Frontier Airlines and costs $196
Fastest flight from Saint Louis to Denver takes 2h 22m
There are direct flights on this route 2 days a week: Tu and We
The distance between Saint Louis and Denver is 1278km (792 miles). There are 96 direct flights from Saint Louis to Denver. The time difference between Saint Louis and Denver is 1h. Flights from Saint Louis begin at 5:10 AM. The latest flight from Saint Louis departs at 10:50 PM
We couldn't find any special offers for flights from Saint Louis to Denver