Leave before 9 am: 85% depart on time. After 4 pm it’s 3 in 5.
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 4362 | STL 08:15 | SMF 10:15 | 4h 00m | 42 | 88% | 0.0% | 25 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 | SMF | 4h 15m | 80% | 0.0% | 331 | Flying now |
Alternatives with one stop
All connections →| SouthwestDetails → | STL 06:00 → LAS 07:25WN 3934 | 1h 10m Las Vegas | LAS 08:35 → SMF 10:05WN 860 | 6h 05m | 94% | 88% |
| SouthwestDetails → | STL 05:45 → PHX 06:55WN 3967 | 50m Phoenix | PHX 07:45 → SMF 09:45WN 2885 | 5h 58m | 83% | 78% |
| SouthwestDetails → | STL 05:05 → DAL 06:45WN 1396 | 55m Dallas | DAL 07:40 → SMF 09:15WN 4218 | 6h 10m | 87% | 62% |
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