Denver (DEN) – St. Louis (STL)
- Distance
- 1,239 km
- 770 mi · 669 nm
- Flight time
- 1 h 58 min / 2 h 19 min
- Average gate to gate: DEN → STL / back
- Time difference
- 1 h
- CO2 per passenger
- 155 kg
- One way, economy, incl. RF (92 kg CO2 only)
- Passengers / year
- 936,788
- Aug 2025 – Jul 2026 · +1.4%
- Flights / week
- 141
- Both directions, average
- Seats filled
- 78%
- 1,201,717 seats a year
- Airlines nonstop
- 4
- WN, UA, F9
Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources
The way there
- Heading from DEN
- 91°
- Heading from STL
- 280°
- Halfway point
- 39.52, -97.47
- Great-circle km
- 1,236 km (sphere, for EU261)
- In the air DEN → STL
- 1 h 35 min
- In the air STL → DEN
- 1 h 56 min
- Clocks
- St. Louis is 1 h ahead of Denver
The estimate for a route without real times is 2 h 15 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 84,250 |
| Sep 2025 | 84,532 |
| Oct 2025 | 86,363 |
| Nov 2025 | 69,059 |
| Dec 2025 | 65,672 |
| Jan 2026 | 59,453 |
| Feb 2026 | 57,758 |
| Mar 2026 | 79,806 |
| Apr 2026 | 71,364 |
| May 2026 | 82,976 |
| Jun 2026 | 96,186 |
| Jul 2026 | 99,369 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 654 |
| Sep 2025 | 650 |
| Oct 2025 | 667 |
| Nov 2025 | 547 |
| Dec 2025 | 532 |
| Jan 2026 | 501 |
| Feb 2026 | 502 |
| Mar 2026 | 636 |
| Apr 2026 | 572 |
| May 2026 | 624 |
| Jun 2026 | 708 |
| Jul 2026 | 754 |
Airlines flying DEN–STL nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| WNSouthwest Airlines | 84 | 59% |
| UAUnited Air Lines | 42 | 30% |
| F9Frontier Airlines | 11 | 10% |
| OOSkyWest Airlines | 4.2 | 1% |
Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources
Aircraft on this route
- Boeing 737-800 · 2,085 flights
- Boeing B737 Max 800 · 2,080 flights
- Boeing 737-700/700LR/Max 7 · 1,068 flights
- Airbus Industrie A319 · 562 flights
- Airbus Industrie A320-100/200 · 529 flights
- Airbus Industrie A321-200n · 268 flights
- Embraer ERJ-175 · 220 flights
- Boeing 737-900ER · 192 flights
Also carried: 416 tonnes of freight and 0 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 76.8%
- Arrived within 15 min of schedule
- Average delay
- 16 min
- Late arrivals count, early ones as 0
- Cancelled
- 0.4%
- Flights counted
- 7,371
- Aug 2025 – Jul 2026
| Airline | On time | Average delay |
|---|---|---|
| WNSouthwest Airlines | 75% | 16 min |
| UAUnited Air Lines | 78.7% | 17 min |
| F9Frontier Airlines | 79.8% | 14 min |
| OOSkyWest Airlines | 86.6% | 7 min |
Delay minutes by cause: airline 25% · aircraft arriving late 48% · air traffic system 24% · weather 3% · security 0%.
Both directions, Aug 2025 – Jul 2026. BTS Reporting Carrier On-Time Performance (US domestic flights of the larger US airlines). Sources
What passengers paid
- Average fare, Q1 2026
- $228
- One way, all cabins
- Average over a year
- $208
- Q3 2025 – Q1 2026
- Largest airline
- Southwest Airlines
- 63% of passengers · $232
- Lowest-fare airline
- Southwest Airlines
- 63% of passengers · $232
History, not a price to book: what the average passenger paid per one-way trip in each quarter (Q3 2025 $197 · Q4 2025 $206 · Q1 2026 $228).
U.S. DOT Consumer Airfare Report, Table 1a (airline ticket sample, US domestic airport pairs). Sources
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 1,236 km.
Neither EU261 nor UK261 covers this route: it neither starts nor ends in the EU, EEA, Switzerland or the UK. Other countries have their own rules (for example Canada's APPR or Brazil's ANAC rules).
Also owed for a cancellation with less than 14 days' notice or denied boarding. Not owed for extraordinary circumstances. On a connection, the distance to the final destination counts. From 23 October 2027 the EU's Regulation 2026/2202 applies; it keeps these amounts (what changes in 2027). Information, not legal advice.
Every airport pair between Denver and St. Louis
Kilometres. Linked numbers have a page of their own. All Denver airports