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Showing Southwest only (incl. its regional partners)All airlines ×
1,471 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 7 in 10.

Best time to leave 5–6 am 99% 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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ONT
99
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64
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68
% 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.

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 5 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 3046 ONT 06:00 OAK 07:20 1h 20m 16 100% 0.0% –
WN 3042 ONT 06:12 OAK 07:38 1h 25m 25 100% 0.0% –
WN 3154 ONT 11:05 OAK 12:20 1h 15m 42 90% 0.0% 38 min
WN 3155 ONT 16:00 OAK 17:15 1h 15m 57 79% 0.0% 34 min
WN 3082 ONT 19:30 OAK 20:50 1h 20m 49 76% 0.0% 93 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 OAK 1h 20m 87% 0.4% 1,471 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