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Showing Delta only (incl. its regional partners)All airlines ×
1,740 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s BOI → SLC flights land within a few points of 92% on time whatever the hour.

Best time to leave 8–9 am 96% arrive on time from BOI
Best single flight DL 2173 BOI 06:00 → SLC 07:11 · 91% 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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BOI
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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 2173 BOI 06:00 SLC 07:11 91%

All 5 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 2173 BOI 06:00 SLC 07:11 1h 11m 354 91% 1.7% 111 min
DL 3607flown by SkyWest BOI 08:25 SLC 09:44 1h 21m 98 97% 0.0% 83 min
DL 1754 BOI 11:59 SLC 13:14 1h 15m 55 91% 1.8% 147 min
DL 1442 BOI 13:05 SLC 14:21 1h 16m 55 93% 0.0% 41 min
DL 2920 BOI 18:42 SLC 19:57 1h 15m 85 81% 1.2% 61 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 BOI SLC 1h 18m 92% 1.0% 1,740 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