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2,114 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: almost all depart on time. After 4 pm it’s 72%.

Best time to leave 8–9 am 98% arrive on time from ONT

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).

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% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55

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 2,114 86% 0.3% 52 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 10 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 3165 ONT 06:00 SMF 07:25 1h 25m 58 97% 0.0% 110 min
WN 2360 ONT 08:05 SMF 09:30 1h 25m 16 100% 0.0% –
WN 3166 ONT 09:45 SMF 11:10 1h 25m 34 91% 0.0% 34 min
WN 3167 ONT 12:00 SMF 13:20 1h 20m 26 92% 3.8% 28 min
WN 527 ONT 12:45 SMF 14:05 1h 20m 16 62% 0.0% 29 min
WN 2298 ONT 13:20 SMF 14:40 1h 20m 33 88% 0.0% 22 min
WN 670 ONT 15:40 SMF 17:05 1h 25m 42 71% 2.4% 48 min
WN 3170 ONT 18:30 SMF 19:55 1h 25m 57 74% 0.0% 71 min
WN 2602 ONT 20:40 SMF 22:02 1h 22m 16 69% 0.0% 43 min
WN 208 ONT 20:50 SMF 22:12 1h 22m 26 69% 0.0% 58 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 ONT SMF 1h 25m 86% 0.3% 2,114 Flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

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