Leave before 9 am: 82% depart on time. After 4 pm it’s 57%.
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 1 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 4283 | STL 08:18 | SAN 09:58 | 3h 40m | 50 | 80% | 0.0% | 31 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 | SAN | 4h 00m | 79% | 0.2% | 473 | Flying now |
Alternatives with one stop
All connections →| SouthwestDetails → | STL 05:45 → DEN 07:00WN 3909 | 1h 15m Denver | DEN 08:15 → SAN 09:40WN 1699 | 5h 55m | 97% | 83% |
| SouthwestDetails → | STL 05:05 → DAL 06:45WN 1396 | 1h 05m Dallas | DAL 07:50 → SAN 08:50WN 192 | 5h 45m | 92% | 79% |
| SouthwestDetails → | STL 05:45 → PHX 06:55WN 3967 | 1h 00m Phoenix | PHX 07:55 → SAN 09:10WN 2771 | 5h 25m | 98% | 69% |
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