Route · STL → DEN · 2020–2025 BTS data
St. Louis to Denver
The STL–DEN corridor (St. Louis, MO → Denver, CO) runs ahead of the national average, served by 27 carriers across roughly 770 miles.
Data updated 2026-06-13
- 79.9%
- On-time
- +0.9 pts
- vs US avg
- 71 min
- Delay when late
- 20,999
- Flights
Cancelled
0.9%
Best Month
Oct 2024 87%
Worst Month
May 2024 66%
Distance
770 mi
Carriers
27
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 266 | 82 | 0 | 1 | WN,F9,UA |
| Nov 2025 | 275 | 49 | 1 | 0 | UA,F9,WN |
| Oct 2025 | 334 | 66 | 0 | 0 | OO,UA,WN,F9 |
| Sep 2025 | 326 | 72 | 0 | 1 | UA,WN,OO,F9 |
| Aug 2025 | 330 | 96 | 0 | 3 | OO,WN,F9,UA |
| Jul 2025 | 352 | 118 | 5 | 5 | OO,UA,WN,F9 |
| Jun 2025 | 339 | 113 | 0 | 4 | OO,UA,WN,F9 |
| May 2025 | 317 | 93 | 2 | 1 | OO,UA,WN,F9 |
| Apr 2025 | 284 | 91 | 2 | 0 | F9,UA,WN |
| Mar 2025 | 293 | 59 | 0 | 0 | UA,WN,F9 |
| Feb 2025 | 252 | 49 | 0 | 0 | UA,WN,F9 |
| Jan 2025 | 272 | 44 | 17 | 0 | UA,WN,F9 |
| Dec 2024 | 308 | 46 | 1 | 0 | F9,UA,WN |
| Nov 2024 | 297 | 40 | 2 | 0 | UA,WN,F9 |
| Oct 2024 | 325 | 41 | 0 | 0 | UA,WN,F9 |
| Sep 2024 | 307 | 39 | 1 | 0 | WN,UA,F9 |
| Aug 2024 | 322 | 70 | 3 | 0 | F9,WN,UA |
| Jul 2024 | 356 | 97 | 6 | 0 | F9,UA,WN |
| Jun 2024 | 344 | 99 | 0 | 1 | F9,UA,WN |
| May 2024 | 348 | 119 | 0 | 1 | F9,UA,WN |
| Apr 2024 | 337 | 64 | 5 | 0 | F9,UA,WN |
| Mar 2024 | 340 | 59 | 8 | 0 | F9,UA,WN |
| Feb 2024 | 289 | 53 | 2 | 0 | F9,UA,WN |
| Jan 2024 | 310 | 66 | 10 | 1 | F9,WN,OO,UA |
Cancellation Rate
0.9%
65 of 7,523 flights
Diversion Rate
0.2%
18 of 7,523 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
STL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
Origin airport →DEN - Denver
Full on-time, delay-cause, and seasonal performance for Denver, CO.
Destination airport →Compare the two airports
See STL and DEN side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to STL–DEN.
Routes with a similar on-time rate
What the Data Says About STL to DEN
20,999 tracked flights put the STL to DEN pairing (St. Louis to Denver) at a 79.9% on-time rate, squarely in line with the wider network. Delays that do occur run 71.2 minutes on average. Across the 770-mile route and its 27 carriers, the trailing 24 months show 0.9% cancelled and 0.2% diverted (7,523 flights sampled).
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 87% on-time, while May 2024 came in at just 66% - a 22-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.