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

Leave before 9 am: 88% depart on time. After 4 pm it’s 3 in 5.

Best time to leave 6–7 am 91% arrive on time from IAH
Best airport pair IAH → ONT 78% on time, fewest cancelled (0.5%), 196 flights
Best single flight F9 3131 IAH 06:10 → ONT 07:32 · 78% on time Avoid F9 1755 IAH 16:02 → LAX 17:30 · 75% 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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IAH
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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 3131 IAH 06:10 ONT 07:32 78%
F9 1755 IAH 16:02 LAX 17:30 75%

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 3131 IAH 06:10 ONT 07:32 3h 31m 196 78% 0.5% 56 min
F9 1755 IAH 16:02 LAX 17:30 3h 36m 330 75% 0.9% 62 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 IAH ONT 3h 31m 78% 0.5% 196 Flying now
Frontier IAH LAX 3h 36m 75% 0.9% 332 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