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

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

No clear winner: United’s DEN → ONT flights land within a few points of 4 in 5 on time whatever the hour.

Best time to leave 11 am–12 pm 88% arrive on time from DEN

Best single flight UA 430 DEN 11:25 → ONT 12:47 · 88% on time Avoid UA 2028 DEN 19:20 → ONT 20:42 · 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).

DEN

% 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 430	DEN 11:25	ONT 12:47	88%
UA 2028	DEN 19:20	ONT 20:42	75%

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 430	DEN 11:25	ONT 12:47	2h 22m	364	88%	0.0%	62 min
UA 1656	DEN 16:05	ONT 17:28	2h 23m	25	46%	0.0%	98 min
UA 2028	DEN 19:20	ONT 20:42	2h 22m	169	75%	0.0%	77 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	DEN	ONT	2h 22m	81%	0.0%	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