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Showing Delta only (incl. its regional partners)All airlines ×
937 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s ONT → ATL flights land within a few points of 9 in 10 on time whatever the hour.

Best time to leave 10–11 pm 94% arrive on time from ONT
Best single flight DL 761 ONT 07:05 → ATL 14:23 · 92% on time Avoid DL 665 ONT 11:50 → ATL 19:11 · 85% 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).

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% 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.
DL 761 ONT 07:05 ATL 14:23 92%
DL 665 ONT 11:50 ATL 19:11 85%

All 4 Delta 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.
DL 761 ONT 07:05 ATL 14:23 4h 18m 364 92% 1.9% 125 min
DL 665 ONT 11:50 ATL 19:11 4h 21m 365 85% 1.6% 73 min
DL 2891 ONT 22:00 ATL 05:14 4h 14m 31 100% 0.0% –
DL 2892 ONT 22:00 ATL 05:18 4h 18m 40 97% 2.5% 16 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.
Delta ONT ATL 4h 18m 90% 1.8% 937 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