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Showing Delta only (incl. its regional partners)All airlines ×
1,083 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s SLC → BOS flights land within a few points of 84% on time whatever the hour.

Best time to leave 11 pm–12 am 92% arrive on time from SLC
Best single flight DL 696 SLC 23:31 → BOS 06:05 · 92% on time Avoid DL 702 SLC 17:15 → BOS 23:49 · 79% 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 696 SLC 23:31 BOS 06:05 92%
DL 657 SLC 09:50 BOS 16:37 82%
DL 702 SLC 17:15 BOS 23:49 79%

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 657 SLC 09:50 BOS 16:37 4h 47m 365 82% 1.1% 54 min
DL 702 SLC 17:15 BOS 23:49 4h 34m 364 79% 1.1% 83 min
DL 696 SLC 23:31 BOS 06:05 4h 34m 337 92% 1.8% 35 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 SLC BOS 4h 38m 84% 1.3% 1,083 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