Cheap flights from Denver to St. Louis (DEN–STL)
DENDenver International Airport
United States
United States
STLSt. Louis Lambert International Airport
United States
United States
Frontier Airlines, Southwest Airlines and United Airlines fly Denver to St. Louis (DEN–STL) nonstop and back, a great-circle distance of 1,240 km (768 mi).
- From
- DEN
- Denver
- To
- STL
- St. Louis
- Nonstop
- Yes · 3 airlines
- Airlines
- F9 · WN · UA
- Cheapest fare found
- $175 one-way
- Distance
- 1,240 km (768 mi)
- Time difference
- St. Louis 1 hour ahead
- Most flights
- Southwest Airlines
- Time in the air
- 1h 33m · 1h 51m back
- On time (Touchdown Index)
- 80.4%
- Flights a week
- F9 ~4 · WN ~37 · UA ~19
- Aircraft seen
- Boeing 737 Max 8 · Boeing 737-800 · Boeing 737-700
Network data imported from airport and airline sources:· How we verify
Denver to St. Louis fares by month
Cheapest one-way fare found: $175 for October 2026 on Frontier Airlines (1 stop).
- Oct ’26$175
Cheapest one-way fares per month of departure in the Aviasales price cache, found . Fares change by the hour: the live fare is shown when you search.
Denver to St. Louis: frequently asked questions
Fares: Aviasales price cache, 8 October 2026; tracked flights between 6 September and 3 October 2026, from public ADS-B data.
How much is a flight from Denver (DEN) to St. Louis Lambert (STL)?
From $175 one-way, the cheapest fare found for October 2026 on Frontier Airlines with 1 stop (found 8 October 2026).
How long is the DEN–STL flight?
1h 33m wheels-up to wheels-down, the median of 244 tracked flights; STL–DEN took 1h 51m.
Which airlines fly DEN–STL direct?
Frontier Airlines, Southwest Airlines and United Airlines.
What is the time difference between Denver and St. Louis?
St. Louis is 1 hour ahead of Denver: a DEN departure at noon is 13:00 local time in STL.
Is DEN–STL usually on time?
80.4% of 414 DEN–STL flights landed within 15 minutes of their usual time; 3.9% were over an hour late.
How many DEN–STL flights a week?
Frontier Airlines 4, Southwest Airlines 37 and United Airlines 19 each way.
What aircraft fly DEN–STL?
Boeing 737 Max 8, Boeing 737-800 and Boeing 737-700.
St. Louis to Denver: the return flight (STL–DEN)
All 3 airlines also fly STL–DEN nonstop.
The return takes 1h 51m in the air (median of 233 tracked flights), 18 minutes longer than DEN–STL.
Airlines flying DEN–STL nonstop
| Airline | Usually takes off (DEN time) | Type | Alliance | Notes |
|---|---|---|---|---|
 Frontier Airlines F9 | 16:13–16:24 | low-cost | — | — |
 Southwest Airlines WN | 07:08–20:43 | low-cost | — | — |
| United Airlines UA | 09:43–18:55 | full-service | Star Alliance | — |
One-stop alternatives to flying DEN–STL nonstop
One airline on both legs; check it's sold as one ticket.
- Via Kansas City (MCI) with Southwest Airlines: 1,240 km (768 mi) flown, almost no further than nonstop.
- Via Omaha (OMA) with Southwest Airlines: 1,310 km (812 mi) flown, 6% further than nonstop.
DEN–STL route map
More from Denver and St. Louis
Other arrivals in United States
Also nonstop from DEN, nearest to STL first (straight-line distance):
- Peoria (PIA) · 221 km (137 mi) from STL
- Cedar Rapids (CID) · 367 km (228 mi) from STL
- DEN–IND: Indianapolis · 367 km (228 mi) from STL
- DEN–MCI: Kansas City · 380 km (236 mi) from STL
- Chicago (MDW) airport guide · 404 km (251 mi) from STL
Explore the airlines’ route maps
- Frontier Airlines route map and destinations
- Southwest Airlines route map and destinations
- United Airlines route map and destinations
Plan your arrival at St. Louis Lambert International Airport (STL)
Departure
Denver International Airport
Denver (DEN), Denver. In our data, 23 airlines fly nonstop from DEN to 165 destinations.
View DEN airport guide →Arrival
St. Louis Lambert International Airport
St. Louis Lambert (STL), St. Louis.
Related routes
Sources
- en.wikipedia.org — airlines and destinations, checked 2026-10-01
- en.wikipedia.org — airlines and destinations, checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
Flight tracking: adsb.lol community ADS-B data (CC0), 6 September – 3 October 2026. Times are median wheels-up to wheels-down; add taxiing for gate-to-gate.
Report a change — seen something different at the airport or on the airline's site? We re-check and log corrections publicly.