| Outbound | Return | Airlines | Shop | Baggage | Price | ||
|---|---|---|---|---|---|---|---|
| Best option St. Louis Denver | Outbound 10/18/25 direct F94567 02h 28min | Return 11/17/25 direct F93302 02h 07min |  Frontier Airlines |  | ? | $137 | |
| St. Louis Denver | Outbound 10/18/25 direct F94567 02h 28min | Return 11/17/25 direct F93302 02h 07min | Frontier Airlines |  | $148 | ||
| St. Louis Denver | Outbound 09/04/25 direct F94567 02h 28min | Return 09/28/25 direct F93302 02h 07min | Frontier Airlines |  | $152 | ||
| St. Louis Denver | Outbound 10/18/25 direct F94567 02h 28min | Return 11/17/25 direct F93302 02h 07min | Frontier Airlines |  | $154 | ||
| St. Louis Denver | Outbound 09/04/25 direct F94567 02h 28min | Return 09/28/25 direct F93302 02h 07min | Frontier Airlines |  | $181 | ||
| St. Louis Denver | Outbound 09/04/25 direct F94567 02h 28min | Return 09/28/25 direct UA1422 02h 06min | Frontier Airlines |  | ? | $226 | |
| St. Louis Denver | Outbound 10/18/25 direct UA2132 02h 21min | Return 11/17/25 direct UA1422 02h 00min |  United Airlines |  | ? | $232 | |
| St. Louis Denver | Outbound 10/18/25 1 Stopover (DFW) AA1363, AA0577 06h 45min | Return 11/17/25 1 Stopover (CLT) AA3299, AA2475 07h 16min |  American Airlines |  | ? | $233 | |
| St. Louis Denver | Outbound 10/18/25 direct UA5979 02h 38min | Return 11/17/25 direct UA1422 02h 00min | United Airlines | | ? | $239 | |
| St. Louis Denver | Outbound 07/25/25 direct F94567 02h 27min | Return 08/17/25 1 Stopover (MCO) F91734, F91631 22h 49min | Frontier Airlines | | $243 |
Stops
- Direct flight
Airline
- Frontier Airlines
- United Airlines
- American Airlines
- Alaska Airlines
Tips and tricks to help you find cheap flights from St. Louis to Denver
Favorite airline: Frontier Airlines
100 % of bookings on this flight route are made with Frontier Airlines, United Airlines and Delta.
Frontier Airlines
55 %
United Airlines
36 %
Delta
9 %
Direct flights are cheaper
Direct flights on this route are $162.00 cheaper on average than flights with a stopover.
non stop flight
1 stop
02h 28min
08h 30min
$117
$279
The favorite connection is non-stop
Non-stop flights are especially popular on this route. 88 % of travelers will book a direct flight.
Route
bookings
Direct flights
02h 28min, from $117
88 %
1 stopover Detroit Metropolitan Wayne County Airport, MI
08h 30min, from $279
12 %
Important flight information
Flight information: St. Louis - Denver
| Roundtrip from | $136.68 |
|---|---|
| Flight duration | min. 02:20 / max. 11:15 |
| Return flight duration | min. 01:50/ max. 07:30 |
| Distance | 1237 km |
| Flights per week | 123 |
| Departure airport | Airport St. Louis - Lambert International Airport (STL) |
| Arrival airport | Airport Denver International Airport, CO (DEN) |
| Destination country | Flights to United States |
Alternative routes to United States
- Flight St. Louis - New York from $183
- Flight St. Louis - Los Angeles from $288
- Flight St. Louis - Las Vegas from $188
- Flight St. Louis - Tampa from $194
- Flight St. Louis - San Francisco from $207
- Flight St. Louis - Orlando from $165
- Flight St. Louis - Fort Myers from $235
- Flight St. Louis - Chicago O'Hare from $182
- Flight St. Louis - Seattle-Tacoma from $214
- Flight St. Louis - Phoenix - Sky Harbor from $198
Alternative flights to Denver
- Flight New York - Denver from $164
- Flight San Francisco - Denver from $166
- Flight Chicago - Denver from $165
- Flight New York - Denver from $229
- Flight Miami - Denver from $220
- Flight Washington-DC - Denver from $206
- Flight Los Angeles - Denver from $128
- Flight Dallas - Denver from $119
- Flight Las Vegas - Denver from $110
- Flight Chicago O'Hare - Denver from $165
Flight destinations with a similar price
- Flight Denver - Istanbul from $735
- Flight Denver - London Heathrow from $460
- Flight Denver - Toronto from $221
- Flight Denver - Frankfurt from $503
- Flight Denver - Munich from $471
- Flight Denver - Muenster-Osnabrueck from $716
- Flight Denver - Hamburg from $537
- Flight Denver - Dusseldorf from $546
- Flight Denver - Cancun from $281
- Flight Denver - Puerto Vallarta from $288
Flight destinations with a similar price
- Flight St. Louis - Atlanta from $130