Route · DEN → STL · 2020–2025 BTS data
Denver to St. Louis
The DEN–STL corridor (Denver, CO → St. Louis, MO) runs behind the national average, served by 27 carriers across roughly 770 miles.
Data updated 2026-06-13
- 77.9%
- On-time
- -1.1 pts
- vs US avg
- 62 min
- Delay when late
- 20,926
- Flights
Cancelled
0.7%
Best Month
Oct 2024 88%
Worst Month
Jul 2025 66%
Distance
770 mi
Carriers
27
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 266 | 53 | 0 | 1 | WN,F9,UA |
| Nov 2025 | 274 | 46 | 1 | 0 | OO,UA,F9,WN |
| Oct 2025 | 333 | 44 | 0 | 0 | OO,UA,WN,F9 |
| Sep 2025 | 326 | 53 | 0 | 1 | UA,WN,OO,F9 |
| Aug 2025 | 329 | 98 | 2 | 1 | OO,WN,F9,UA |
| Jul 2025 | 352 | 118 | 0 | 2 | OO,UA,WN,F9 |
| Jun 2025 | 341 | 113 | 1 | 0 | OO,UA,WN,F9 |
| May 2025 | 329 | 87 | 3 | 1 | OO,UA,WN,F9 |
| Apr 2025 | 297 | 58 | 2 | 0 | F9,UA,WN |
| Mar 2025 | 300 | 50 | 0 | 0 | UA,WN,F9 |
| Feb 2025 | 252 | 40 | 0 | 0 | UA,WN,F9 |
| Jan 2025 | 272 | 65 | 13 | 2 | UA,WN,F9 |
| Dec 2024 | 307 | 48 | 0 | 0 | F9,UA,WN |
| Nov 2024 | 295 | 63 | 3 | 0 | UA,WN,F9 |
| Oct 2024 | 323 | 39 | 1 | 0 | UA,WN,F9 |
| Sep 2024 | 307 | 42 | 0 | 0 | WN,UA,F9 |
| Aug 2024 | 322 | 80 | 1 | 0 | F9,WN,UA |
| Jul 2024 | 356 | 88 | 7 | 1 | F9,UA,WN |
| Jun 2024 | 342 | 99 | 0 | 0 | F9,UA,WN |
| May 2024 | 334 | 102 | 0 | 1 | F9,UA,WN |
| Apr 2024 | 325 | 70 | 1 | 1 | F9,UA,WN |
| Mar 2024 | 330 | 75 | 8 | 0 | F9,UA,WN |
| Feb 2024 | 290 | 66 | 3 | 0 | F9,OO,UA,WN |
| Jan 2024 | 309 | 97 | 8 | 0 | F9,WN,OO,UA |
Cancellation Rate
0.7%
54 of 7,511 flights
Diversion Rate
0.1%
11 of 7,511 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
DEN - Denver
Full on-time, delay-cause, and seasonal performance for Denver, CO.
Origin airport →STL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
Destination airport →Compare the two airports
See DEN and STL side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to DEN–STL.
Routes with a similar on-time rate
What the Data Says About DEN to STL
The Denver to St. Louis corridor (DEN to STL) posts a 77.9% on-time rate on the lower edge of the average band, based on 20,926 tracked flights. Late flights run 62.1 minutes behind on average. 27 carriers cover the 770-mile route; over the last 24 months, 54 of 7,511 flights were cancelled (0.7%) and 0.1% diverted.
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 88% on-time, while Jul 2025 came in at just 66% - a 21-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.