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Showing Frontier only (incl. its regional partners)All airlines ×
728 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 7 in 10.

Best time to leave 6–7 am 93% arrive on time from ONT
Best single flight F9 2232 ONT 11:58 → LAS 13:06 · 84% on time Avoid F9 4758 ONT 15:34 → LAS 16:46 · 70% on time

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
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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.

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.
F9 2232 ONT 11:58 LAS 13:06 84%
F9 4758 ONT 15:34 LAS 16:46 70%

All 2 Frontier 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.
F9 2232 ONT 11:58 LAS 13:06 1h 10m 294 84% 1.0% 100 min
F9 4758 ONT 15:34 LAS 16:46 1h 12m 204 70% 3.4% 88 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.
Frontier ONT LAS 1h 12m 78% 1.5% 728 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