Showing United only (incl. its regional partners)All airlines ×

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

Leave before 9 am: 93% depart on time. After 4 pm it’s 3 in 4.

Best time to leave 5–6 am 94% arrive on time from ONT

Best single flight UA 2446 ONT 05:00 → DEN 08:20 · 94% on time Avoid UA 1263 ONT 13:18 → DEN 16:38 · 84% 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).

ONT

% 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.


UA 2446	ONT 05:00	DEN 08:20	94%
UA 1263	ONT 13:18	DEN 16:38	84%

All 3 United 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
UA 1263	ONT 13:18	DEN 16:38	2h 20m	206	84%	0.5%	87 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

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