2,476 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 3 in 5.

Best time to leave 8–9 am 95% arrive on time from LAS

Best single flight F9 1283 LAS 07:00 → ONT 08:03 · 86% on time Avoid F9 2231 LAS 18:43 → ONT 19:51 · 78% 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).

LAS

% 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

Ontario flights leaving LAS 9–10 pm: 1Close ×


WN 2301	LAS 21:45	ONT 22:48	1h 02m	16	38%	0.0%	40 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.


Frontier	727	82%	1.0%	76 min
Southwest	1,749	74%	0.6%	49 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.


F9 1283	LAS 07:00	ONT 08:03	86%
F9 1357	LAS 13:59	ONT 15:09	82%
F9 2231	LAS 18:43	ONT 19:51	78%

All 12 flights on this route →

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	LAS	ONT	1h 10m	82%	1.0%	727	Flying now
Southwest	LAS	ONT	1h 05m	74%	0.6%	1,749	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