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Showing Delta only (incl. its regional partners)All airlines ×
1,313 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 3 in 5.

Best time to leave 7–8 am 80% arrive on time from BOS
Best single flight DL 2570 BOS 07:30 → ORD 09:28 · 82% on time Avoid DL 2646 BOS 16:15 → ORD 18:19 · 61% 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).

7
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BOS
89
77
78
65
53
57
% 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 2570 BOS 07:30 ORD 09:28 82%
DL 2646 BOS 16:15 ORD 18:19 61%

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 2570 BOS 07:30 ORD 09:28 2h 58m 263 82% 3.0% 60 min
DL 2816 BOS 12:25 ORD 14:19 2h 54m 91 83% 3.3% 96 min
DL 2646 BOS 16:15 ORD 18:19 3h 04m 259 61% 4.6% 79 min
DL 2804 BOS 20:45 ORD 22:39 2h 57m 109 47% 6.4% 75 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 BOS ORD 3h 03m 67% 4.3% 1,313 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