1,311 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: airlines and hours on this route all land within a few points of 78% on time.

Best time to leave 9–10 pm 90% arrive on time from DTW

Best single flight DL 3993 DTW 08:30 → SDF 09:59 · 83% on time Avoid DL 5832 DTW 19:45 → SDF 21:15 · 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).

DTW

% 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.

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.


Delta (incl. Endeavor, SkyWest, Republic)	1,301	78%	1.2%	89 min
Spirit	10	–	0.0%	–

Dimmed: fewer than 150 flights in the year, too few to rank.

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 3993flown by SkyWest	DTW 08:30	SDF 09:59	83%
DL 5832flown by Republic	DTW 19:45	SDF 21:15	79%

All 6 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 3821flown by SkyWest	DTW 08:25	SDF 09:55	1h 30m	139	84%	1.4%	54 min
DL 3993flown by SkyWest	DTW 08:30	SDF 09:59	1h 29m	205	83%	1.5%	102 min
DL 5160flown by Endeavor	DTW 12:13	SDF 13:39	1h 26m	46	76%	2.2%	57 min
DL 4947flown by Endeavor	DTW 15:18	SDF 16:46	1h 28m	55	61%	1.8%	86 min
DL 3957flown by SkyWest	DTW 15:50	SDF 17:12	1h 22m	132	69%	0.8%	81 min
DL 5832flown by Republic	DTW 19:45	SDF 21:15	1h 30m	364	79%	1.1%	95 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	DTW	SDF	1h 26m	78%	1.2%	1,301	Flying now
Spirit	DTW	SDF	–	100%few flights	0.0%	10	Not 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