1,239 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: airlines and hours on this route all land within a few points of 9 in 10 on time.

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

Best single flight DL 1614 SLC 22:59 → ONT 23:48 · 89% 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).

SLC

% 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 SLC 3–4 pm: 2Close ×


DL 3762flown by SkyWest	SLC 15:23	ONT 16:17	1h 54m	31	97%	0.0%	31 min
DL 4443flown by SkyWest	SLC 15:45	ONT 16:41	1h 56m	55	87%	0.0%	85 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.


Delta (incl. SkyWest)	1,209	90%	0.9%	63 min
Frontier	30	–	3.3%	101 min

Dimmed: fewer than 150 flights in the year, too few to rank.

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.


DL 1614	SLC 22:59	ONT 23:48	89%

All 6 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.


Delta	SLC	ONT	1h 51m	90%	0.9%	1,209	Flying now
Frontier	SLC	ONT	1h 53m	93%few flights	3.3%	30	Not 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