The nonstop is quickest: Southwest BNA → ONT (4h 35m), on time 7 times in 10. Southwest via Phoenix (8h 00m) is more reliable, 88%, but takes 3h 25m longer.
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 1 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 855 | BNA 13:55 | ONT 16:00 | 4h 05m | 50 | 52% | 0.0% | 39 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 | BNA | ONT | 4h 35m | 71% | 0.3% | 336 | Flying now |
Alternatives with one stop
All connections →| SouthwestDetails → | BNA 05:20 → PHX 06:55WN 635 | 55m Phoenix | PHX 07:50 → ONT 09:05WN 759 | 5h 45m | 85% | 79% |
| SouthwestDetails → | BNA 05:15 → DEN 07:00WN 800 | 50m Denver | DEN 07:50 → ONT 09:10WN 1660 | 5h 55m | 80% | 68% |
| SouthwestDetails → | BNA 19:15 → PHX 20:50WN 642 | 2h 05m Phoenix | PHX 22:55 → ONT 00:08 +1WN 223 | 6h 52m | 86% | 66% |
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