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Cheap flights from St. Louis to Denver
Round-trip
Economy
Flight information for St. Louis to Denver
(STL to DEN)
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Denver
| Best Price Found | $74 | The best flight deal from St. Louis to Denver found on momondo in the last 72 hours is $74 |
| Fastest flight time | 2h 20m | The fastest flight from St. Louis to Denver takes 2h 20m |
| Direct flights | Mo, Fr, Sa and Su | Direct flights go from St. Louis to Denver on Monday, Friday, Saturday and Sunday. The only airline offering direct flights is Frontier. |
| Airports in Denver | 2 airports | There are 2 airports near Denver: Denver Arapahoe Co (APA), Denver Intl (DEN) |
How to get the cheapest flight ticket from St. Louis to Denver
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 cheapest month to fly from St. Louis to Denver?
September
The cheapest time of year to fly to Denver from St. Louis is September. Most expensive is December
What is the cheapest day to depart St. Louis for Denver?
Wednesday
The cheapest day of the week is typically Wednesday. The most expensive is typically Sunday
When is the cheapest time to fly from St. Louis to Denver?
in the evening
St. Louis to Denver flights are approximately 41% more expensive in the afternoon than in the evening
What is the cheapest airline that flies to Denver from St. Louis?
Frontier
Frontier, American Airlines, and Delta are the most popular carriers operating from St. Louis to Denver
What is the cheapest St. Louis to Denver flight route?
Lambert-St Louis - Denver Intl
Fly from Lambert-St Louis to Denver Intl for the best St. Louis - Denver flight prices
STL
Lambert-St Louis
DEN
Denver Intl
How far in advance should you book St. Louis to Denver flights?
60 days before
The cheapest time to buy a flight from St. Louis to Denver is approximately 60 days to departure
60
Days before departure
0
Easily compare round-trip flights from St. Louis to Denver
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 Denver by changing tabs
Multiple Airlines![Multiple Airlines]()
May 20![Multiple Airlines]()
May 24
STL6:50 pmLambert-St Louis
2h 29m
DEN9:19 pmDenver Intl
DEN2:42 pmDenver Intl
2h 03m
STL4:45 pmLambert-St Louis
Frontier![Frontier]()
May 13![Frontier]()
May 16
STL6:50 pmLambert-St Louis
2h 29m
DEN9:19 pmDenver Intl
DEN2:10 amDenver Intl
2h 06m
STL4:16 amLambert-St Louis
Find the cheapest one-way flights from St. Louis to Denver
If you're looking for one-way flights from St. Louis to Denver, view some of our deals below provided by Frontier
Best airlines flying from St. Louis to Denver
Compare and see reviews for airlines that fly from St. Louis to Denver with momondo
AirlineFree CancellationPrice
PriceFrom $57
Free Cancellation
Reviews
Cons: Everything is ok
1 / 10
PriceFrom $57
Free Cancellation
Reviews
Pros: Yes made sure mask was in place
Cons: No
1 / 10
PriceFrom $69
Free Cancellation
Reviews
Pros: The plane was new and the seats were nice.
1 / 10
PriceFrom $77
Free Cancellation
Reviews
Cons: Wouldn't let us on the flight when there was plenty of time to get there. Manager was arrogant and slow - didn't care. Poor policies at that airport.
1 / 10
PriceFrom $97
Free Cancellation
Reviews
Pros: It was meh....
Cons: I got no notification that the flight was going to be 1 hour earlier
1 / 10
Which airlines flying from Lambert-St Louis to Denver Intl have COVID-19 safety policies in place?
Delta has implemented additional safety measures to accommodate travelers. Usage of HEPA filters, scheduled sanitation, enhanced cleaning of aircrafts, pre-flight testing, and mask policies are some of the implemented practices made by airlines to help keep you safe as you depart from Lambert-St Louis to Denver Intl. Keep in mind that policies will vary by airline.
Are airlines flying from Lambert-St Louis to Denver Intl 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 Denver Intl, such as Frontier, United Airlines, and American 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 Denver
Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
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