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Showing Delta only (incl. its regional partners)All airlines ×
2,365 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s BOI → SEA flights land within a few points of 87% on time whatever the hour.

Best time to leave 6–7 am 96% arrive on time from BOI
Best single flight DL 3775 BOI 06:43 → SEA 07:35 · 96% on time Avoid DL 3688 BOI 19:28 → SEA 20:14 · 77% 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
97
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92
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87
% 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 3775flown by SkyWest BOI 06:43 SEA 07:35 96%
DL 3750flown by SkyWest BOI 10:36 SEA 11:41 92%
DL 3678flown by SkyWest BOI 11:55 SEA 12:42 92%
DL 3740flown by SkyWest BOI 08:42 SEA 09:38 85%
DL 4127flown by SkyWest BOI 18:10 SEA 18:54 83%
· · ·
DL 3688flown by SkyWest BOI 19:28 SEA 20:14 77%

All 9 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 3775flown by SkyWest BOI 06:43 SEA 07:35 1h 52m 361 96% 0.0% 83 min
DL 3740flown by SkyWest BOI 08:42 SEA 09:38 1h 56m 345 85% 0.0% 88 min
DL 3750flown by SkyWest BOI 10:36 SEA 11:41 2h 05m 208 92% 0.5% 129 min
DL 3678flown by SkyWest BOI 11:55 SEA 12:42 1h 47m 334 92% 0.0% 52 min
DL 3817flown by SkyWest BOI 12:15 SEA 12:55 1h 40m 31 90% 0.0% 101 min
DL 4157flown by SkyWest BOI 15:14 SEA 15:53 1h 39m 31 87% 0.0% 29 min
DL 3958flown by SkyWest BOI 15:29 SEA 16:11 1h 42m 50 82% 0.0% 51 min
DL 4127flown by SkyWest BOI 18:10 SEA 18:54 1h 44m 333 83% 0.6% 56 min
DL 3688flown by SkyWest BOI 19:28 SEA 20:14 1h 46m 226 77% 0.4% 44 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 SEA 1h 48m 87% 0.2% 2,365 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