Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s almost half.
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 7 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 1660 | DEN 07:50 | ONT 09:10 | 2h 20m | 58 | 84% | 0.0% | 31 min |
| WN 4080 | DEN 10:55 | ONT 12:10 | 2h 15m | 34 | 65% | 0.0% | 43 min |
| WN 3627 | DEN 11:20 | ONT 12:40 | 2h 20m | 16 | 88% | 0.0% | 28 min |
| WN 1737 | DEN 13:35 | ONT 14:55 | 2h 20m | 51 | 61% | 0.0% | 38 min |
| WN 189 | DEN 17:40 | ONT 19:00 | 2h 20m | 16 | 38% | 0.0% | 105 min |
| WN 2949 | DEN 18:40 | ONT 20:00 | 2h 20m | 40 | 40% | 0.0% | 52 min |
| WN 1663 | DEN 21:15 | ONT 22:35 | 2h 20m | 57 | 35% | 0.0% | 50 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 | DEN | ONT | 2h 20m | 71% | 0.1% | 1,268 | 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