Leave before 9 am: 93% depart on time. After 4 pm it’s barely half.
Time of day × airport
Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).
Pick an hour to see this route’s flights leaving then.
Flights, best and worst
Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
No Southwest flight on this route ran 150+ times in the year.
All 7 Southwest flights in the current schedule
Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
| WN 3909 | STL 05:45 | DEN 07:00 | 2h 15m | 58 | 91% | 0.0% | 47 min |
| WN 3910 | STL 08:42 | DEN 10:02 | 2h 20m | 50 | 90% | 0.0% | 32 min |
| WN 4312 | STL 11:30 | DEN 12:40 | 2h 10m | 50 | 72% | 0.0% | 39 min |
| WN 824 | STL 14:05 | DEN 15:20 | 2h 15m | 50 | 60% | 0.0% | 82 min |
| WN 3912 | STL 16:00 | DEN 17:20 | 2h 20m | 58 | 51% | 0.0% | 71 min |
| WN 3913 | STL 18:40 | DEN 20:00 | 2h 20m | 50 | 47% | 0.0% | 67 min |
| WN 3914 | STL 22:35 | DEN 23:18 | 2h 20m | 42 | 60% | 0.0% | 67 min |
Nonstops by airline and airport
Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
| Southwest | STL | DEN | 2h 20m | 75% | 0.0% | 2,175 | Flying now |
About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON