Showing Delta only (incl. its regional partners)All airlines ×

569 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s BOS → MKE flights land within a few points of 82% on time whatever the hour.

Best time to leave 8–9 pm 91% arrive on time from BOS

Best single flight DL 5614 BOS 09:10 → MKE 10:54 · 89% on time Avoid DL 5619 BOS 16:45 → MKE 18:35 · 78% 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).

BOS

% 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 5614flown by Republic	BOS 09:10	MKE 10:54	89%
DL 5619flown by Republic	BOS 16:45	MKE 18:35	78%

All 2 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 5614flown by Republic	BOS 09:10	MKE 10:54	2h 41m	253	89%	2.0%	56 min
DL 5619flown by Republic	BOS 16:45	MKE 18:35	2h 50m	291	78%	5.8%	59 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	MKE	2h 46m	82%	4.0%	569	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