The best bet has a stop: Southwest via Phoenix (6h 10m) reaches Ontario on time 86% of the time, against 70% on the nonstop.
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.
Airlines on this route
Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
| Southwest | 360 | 71% | 1.1% | 53 min |
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 flight on this route ran 150+ times in the year.
All 1 flights on this route →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 | MDW | ONT | 4h 15m | 71% | 1.1% | 360 | Flying now |
Alternatives with one stop
All connections →| SouthwestDetails → | MDW 07:10 → PHX 08:45WN 2520 | 1h 20m Phoenix | PHX 10:05 → ONT 11:20WN 431 | 6h 10m | 100% | 86% |
| SouthwestDetails → | MDW 05:15 → DEN 06:50WN 2989 | 1h 00m Denver | DEN 07:50 → ONT 09:10WN 1660 | 5h 55m | 98% | 83% |
| SouthwestDetails → | MDW 05:20 → PHX 06:55WN 2858 | 55m Phoenix | PHX 07:50 → ONT 09:05WN 759 | 5h 45m | 85% | 79% |
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