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

No clear winner: Delta’s STL → SLC flights land within a few points of 88% on time whatever the hour.

Best time to leave 8–9 am 94% arrive on time from STL
Best single flight DL 2363 STL 08:00 → SLC 10:12 · 91% on time Avoid DL 1492 STL 19:55 → SLC 22:05 · 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).

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STL
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84
% 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 2363 STL 08:00 SLC 10:12 91%
DL 2455 STL 14:28 SLC 16:40 90%
DL 1492 STL 19:55 SLC 22:05 84%

All 3 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 2363 STL 08:00 SLC 10:12 3h 12m 365 91% 0.8% 121 min
DL 2455 STL 14:28 SLC 16:40 3h 12m 258 90% 0.0% 78 min
DL 1492 STL 19:55 SLC 22:05 3h 13m 297 84% 1.7% 120 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 STL SLC 3h 13m 88% 0.9% 981 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