Leave before 9 am: 95% depart on time. After 4 pm it’s 7 in 10.
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 4911 | SMF 06:00 | ONT 07:20 | 1h 20m | 34 | 97% | 2.9% | 225 min |
| WN 3145 | SMF 06:20 | ONT 07:40 | 1h 20m | 16 | 100% | 0.0% | – |
| WN 3805 | SMF 09:10 | ONT 10:30 | 1h 20m | 50 | 92% | 0.0% | 50 min |
| WN 1450 | SMF 11:35 | ONT 12:55 | 1h 20m | 16 | 94% | 0.0% | 17 min |
| WN 300 | SMF 12:00 | ONT 13:25 | 1h 25m | 34 | 71% | 0.0% | 35 min |
| WN 3807 | SMF 14:00 | ONT 15:20 | 1h 20m | 42 | 83% | 2.4% | 28 min |
| WN 3808 | SMF 16:15 | ONT 17:35 | 1h 20m | 26 | 38% | 0.0% | 46 min |
| WN 480 | SMF 17:30 | ONT 18:55 | 1h 25m | 41 | 75% | 2.4% | 37 min |
| WN 588 | SMF 18:50 | ONT 20:15 | 1h 25m | 16 | 75% | 0.0% | 41 min |
| WN 4984 | SMF 20:55 | ONT 22:15 | 1h 20m | 50 | 66% | 0.0% | 48 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 | SMF | ONT | 1h 20m | 85% | 0.4% | 2,115 | 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