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2,643 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 94% depart on time. After 4 pm it’s 2 in 3.

Best time to leave 5–6 am 95% arrive on time from ONT
Best single flight UA 2446 ONT 05:00 → DEN 08:20 · 94% on time Avoid F9 2908 ONT 10:50 → DEN 14:10 · 77% 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).

5
6
7
8
9
10
11
12
13
14
15
16
17
18
ONT
94
95
90
94
94
78
68
57
76
60
57
61
74
% 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.
United 823 87% 0.4% 90 min
Frontier 552 85% 0.4% 100 min
Southwest 1,268 77% 0.3% 55 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.
UA 2446 ONT 05:00 DEN 08:20 94%
F9 1500 ONT 06:00 DEN 09:24 90%
UA 1263 ONT 13:18 DEN 16:38 84%
F9 2908 ONT 10:50 DEN 14:10 77%

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.
UA 2446 ONT 05:00 DEN 08:20 2h 20m 272 94% 0.4% 59 min
WN 3144 ONT 05:50 DEN 09:05 2h 15m 58 97% 0.0% 30 min
F9 1500 ONT 06:00 DEN 09:24 2h 24m 320 90% 0.3% 80 min
WN 3145 ONT 08:05 DEN 11:15 2h 10m 57 95% 0.0% 111 min
F9 2908 ONT 10:50 DEN 14:10 2h 21m 173 77% 0.6% 123 min
WN 3146 ONT 12:50 DEN 16:05 2h 15m 42 39% 0.0% 50 min
UA 1263 ONT 13:18 DEN 16:38 2h 20m 206 84% 0.5% 87 min
WN 3147 ONT 14:30 DEN 17:40 2h 10m 34 24% 0.0% 61 min
WN 2687 ONT 14:50 DEN 18:00 2h 10m 16 47% 0.0% 130 min
UA 1316 ONT 18:30 DEN 21:51 2h 21m 25 60% 0.0% 130 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.
United ONT DEN 2h 18m 87% 0.4% 823 Flying now
Frontier ONT DEN 2h 24m 85% 0.4% 552 Flying now
Southwest ONT DEN 2h 15m 77% 0.3% 1,268 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