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
28 Sep
STL
2:32 pm
Lambert-St Louis airport
2h 30m
4:02 pm
DEN
Denver Intl airport
Frontier
03 Oct
DEN
12:02 am
Denver Intl airport
2h 10m
3:12 am
STL
Lambert-St Louis airport
84 USD
American Airlines
American Airlines
01 Oct
STL
7:54 am
Lambert-St Louis airport
6h 31m
1 Stop
1:25 pm
DEN
Denver Intl airport
American Airlines
02 Oct
DEN
2:25 pm
Denver Intl airport
2h 07m
5:32 pm
STL
Lambert-St Louis airport
96 USD
American Airlines
American Airlines
05 Oct
STL
7:07 am
Lambert-St Louis airport
5h 05m
1 Stop
11:12 am
DEN
Denver Intl airport
American Airlines
07 Oct
DEN
12:02 am
Denver Intl airport
2h 10m
3:12 am
STL
Lambert-St Louis airport
96 USD
United Airlines
United Airlines
29 Sep
STL
12:50 am
Lambert-St Louis airport
2h 25m
2:15 am
DEN
Denver Intl airport
United Airlines
05 Oct
DEN
7:31 am
Denver Intl airport
1h 59m
10:30 am
STL
Lambert-St Louis airport
112 USD
United Airlines
United Airlines
29 Sep
STL
12:50 am
Lambert-St Louis airport
2h 25m
2:15 am
DEN
Denver Intl airport
United Airlines
04 Oct
DEN
2:15 pm
Denver Intl airport
2h 05m
5:20 pm
STL
Lambert-St Louis airport
127 USD
Frontier
Frontier
28 Sep
STL
2:32 pm
Lambert-St Louis airport
2h 30m
4:02 pm
DEN
Denver Intl airport
Frontier
03 Oct
DEN
12:02 am
Denver Intl airport
2h 10m
3:12 am
STL
Lambert-St Louis airport
84 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 35% more expensive at noon than in the evening
What is the cheapest airline that flies to Denver?
Frontier
Frontier, Delta, and American Airlines 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 10m The fastest flight from St. Louis to Denver takes 2h 10m.
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: