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: 87% depart on time. After 4 pm it’s 3 in 5.

Best time to leave 6–7 am 86% arrive on time from ORD

Best single flight DL 2570 ORD 10:29 → BOS 13:59 · 76% on time Avoid DL 2646 ORD 19:25 → BOS 23:00 · 65% 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).

ORD

% 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	ORD 10:29	BOS 13:59	76%
DL 2646	ORD 19:25	BOS 23:00	65%

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 2828	ORD 07:10	BOS 10:46	2h 36m	110	87%	6.4%	69 min
DL 2570	ORD 10:29	BOS 13:59	2h 30m	239	76%	2.1%	71 min
DL 2816	ORD 15:19	BOS 18:59	2h 40m	91	62%	3.3%	92 min
DL 2646	ORD 19:25	BOS 23:00	2h 37m	164	65%	9.1%	98 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	ORD	BOS	2h 30m	71%	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