Cheap flights from St. Louis to Denver

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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
Quickest
Cheapest
Frontier
Frontier
18 Nov
STL
6:06 am
Lambert-St Louis airport
2h 35m
7:41 am
DEN
Denver Intl airport
Frontier
04 Dec
DEN
10:00 pm
Denver Intl airport
5h 19m
1 Stop
4:19 am
+1
STL
Lambert-St Louis airport
76 USD
American Airlines
American Airlines
03 Dec
STL
12:20 am
Lambert-St Louis airport
8h 05m
1 Stop
7:25 am
DEN
Denver Intl airport
American Airlines
06 Dec
DEN
1:06 am
Denver Intl airport
2h 04m
4:10 am
STL
Lambert-St Louis airport
76 USD
Frontier
Frontier
20 Nov
STL
6:06 am
Lambert-St Louis airport
2h 35m
7:41 am
DEN
Denver Intl airport
Frontier
23 Nov
DEN
9:47 am
Denver Intl airport
4h 32m
1 Stop
3:19 pm
STL
Lambert-St Louis airport
76 USD
United Airlines
United Airlines
16 Jan
STL
12:50 am
Lambert-St Louis airport
2h 48m
2:38 am
DEN
Denver Intl airport
United Airlines
20 Jan
DEN
1:44 am
Denver Intl airport
2h 15m
4:59 am
STL
Lambert-St Louis airport
210 USD
American Airlines
American Airlines
26 Nov
STL
3:25 am
Lambert-St Louis airport
5h 00m
1 Stop
7:25 am
DEN
Denver Intl airport
American Airlines
29 Nov
DEN
1:06 am
Denver Intl airport
2h 04m
4:10 am
STL
Lambert-St Louis airport
123 USD
Frontier
Frontier
20 Nov
STL
6:06 am
Lambert-St Louis airport
2h 35m
7:41 am
DEN
Denver Intl airport
Frontier
23 Nov
DEN
9:47 am
Denver Intl airport
4h 32m
1 Stop
3:19 pm
STL
Lambert-St Louis airport
76 USD

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 to Denver?
April
The cheapest time of year to fly to Denver from St. Louis is April. Most expensive is December
What is the cheapest day to fly to Denver?
Tuesday
The cheapest day of the week is typically Tuesday. The most expensive is typically Sunday
When is the cheapest time to fly to Denver?
in the evening
St. Louis to Denver flights are approximately 36% more expensive at noon than in the evening
What is the cheapest airline that flies to Denver?
Frontier
Frontier, American Airlines, and Delta are the most popular carriers operating from St. Louis to Denver
What is the cheapest 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
When is the cheapest time to book a flight to Denver?
42 days before
The cheapest time to buy a flight from St. Louis to Denver is approximately 42 days to departure
60
Days before departure
0

Flight information for St. Louis to Denver (DEN - STL)

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Denver
Fastest flight time 2h 20m The fastest flight from St. Louis to Denver takes 2h 20m.
Direct flights Every day Direct flights go from St. Louis to Denver every day.
Airports in Denver 2 airports There are 2 airports near Denver: Denver Arapahoe Co (APA), Denver Intl (DEN)

Flights from St. Louis to: