Leave before 9 am: almost all depart on time. After 4 pm it’s 72%.
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 10 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 3165 | ONT 06:00 | SMF 07:25 | 1h 25m | 58 | 97% | 0.0% | 110 min |
| WN 2360 | ONT 08:05 | SMF 09:30 | 1h 25m | 16 | 100% | 0.0% | – |
| WN 3166 | ONT 09:45 | SMF 11:10 | 1h 25m | 34 | 91% | 0.0% | 34 min |
| WN 3167 | ONT 12:00 | SMF 13:20 | 1h 20m | 26 | 92% | 3.8% | 28 min |
| WN 527 | ONT 12:45 | SMF 14:05 | 1h 20m | 16 | 62% | 0.0% | 29 min |
| WN 2298 | ONT 13:20 | SMF 14:40 | 1h 20m | 33 | 88% | 0.0% | 22 min |
| WN 670 | ONT 15:40 | SMF 17:05 | 1h 25m | 42 | 71% | 2.4% | 48 min |
| WN 3170 | ONT 18:30 | SMF 19:55 | 1h 25m | 57 | 74% | 0.0% | 71 min |
| WN 2602 | ONT 20:40 | SMF 22:02 | 1h 22m | 16 | 69% | 0.0% | 43 min |
| WN 208 | ONT 20:50 | SMF 22:12 | 1h 22m | 26 | 69% | 0.0% | 58 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 | ONT | SMF | 1h 25m | 86% | 0.3% | 2,114 | 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