St Louis to Denver (STL–DEN) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
STL–DEN is served by 3 airlines with nonstop service. United Airlines, Southwest Airlines and Frontier lead the route. The flight covers 768 miles in approximately 1h 54m. Beyond nonstop, 130 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| UA United Airlines Also: AC | 53 | 319, 738, 7M8, E7W | 2h22-2h35 | Star Alliance | AC | |
| WN Southwest Airlines | 46 | 73H, 7M8, B38M | 2h02-2h25 | – | – | |
| F9 Frontier | 7 | 32N | 2h33 | – | – |
Weekly Schedule Pattern
Connection Landscape
Other ways to reach Denver from St Louis
| Metric | STL→DEN | COU→DEN | PIA→DEN |
|---|---|---|---|
| Distance from STL | – | 100 mi | 137 mi |
| Nonstop airlines | 3 | 2 | 2 |
| Weekly flights | 114 | 7 | 9 |
| Flight time | 1h 54m | 2h 21m | 2h 23m |
| Departure OTP | 88% | – | – |
Travel Essentials
STL: CDT · DEN: MDT
When it's 6:00 PM in St Louis, it's 5:00 PM in Denver.
RTD A Line runs to Denver Union Station (37 min, $10.50) with connections to light rail and bus routes. Taxis have meters; expect $55–65 to downtown.DEN's tent-roof Jeppesen Terminal is a single building; all three concourses connect via the underground automated train. Rental cars are on level 5. For ski resorts, shuttle services depart from Ground Transportation.
Semi-arid with 300+ days of sunshine. Summers are dry and warm (27–34°C) with afternoon thunderstorms that produce dramatic but brief delays. Winters bring cold temperatures (−8 to 5°C) and heavy blizzards that can shut down ground operations.
Spring snowstorms can be heavier than midwinter ones. Altitude (5,430 ft) means low humidity year-round; stay hydrated.
STL–DEN Quick Facts
Frequently Asked Questions
Flights from STL to DEN
St. Louis Lambert International Airport (STL) and Denver International Airport (DEN) are connected by nonstop service from Frontier, United Airlines and Southwest Airlines. With 114 weekly departures, this is a heavily served route.
STL to DEN Flight Duration and Schedule
Nonstop flight time from STL to DEN ranges from 1 hours 54 minutes to 2 hours 40 minutes. The route covers a distance of 768 miles (1,236 km). There are approximately 114 weekly flights outbound and 109 return, totaling 223 flights per week in both directions.
Connecting Options and Alternatives
130 one-stop connections are available, with the fastest taking approximately 3 hours via SUS. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Columbia (COU) and Peoria (PIA).