Leave before 9 am: almost all 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 6 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 4879 | SJC 06:30 | ONT 07:50 | 1h 20m | 58 | 98% | 1.7% | 25 min |
| WN 3151 | SJC 10:50 | ONT 12:05 | 1h 15m | 57 | 88% | 1.8% | 68 min |
| WN 3691 | SJC 16:40 | ONT 18:00 | 1h 20m | 26 | 50% | 0.0% | 39 min |
| WN 646 | SJC 18:20 | ONT 19:40 | 1h 20m | 16 | 44% | 0.0% | 40 min |
| WN 3692 | SJC 20:15 | ONT 21:35 | 1h 18m | 42 | 45% | 0.0% | 49 min |
| WN 457 | SJC 20:55 | ONT 22:12 | 1h 18m | 16 | 44% | 0.0% | 65 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 | SJC | ONT | 1h 15m | 83% | 0.2% | 1,317 | 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