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

2,318 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 84% depart on time. After 4 pm it’s 73%.

Best time to leave 5–6 am 85% arrive on time from GRR

Best single flight DL 4885 GRR 05:30 → DTW 06:30 · 85% on time Avoid DL 3500 GRR 10:34 → DTW 11:35 · 81% 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).

GRR

% 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 4885flown by Endeavor	GRR 05:30	DTW 06:30	85%
DL 3500flown by SkyWest	GRR 10:34	DTW 11:35	81%

All 12 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 4094flown by SkyWest	GRR 05:30	DTW 06:27	57m	31	94%	0.0%	94 min
DL 4885flown by Endeavor	GRR 05:30	DTW 06:30	1h 00m	160	85%	1.2%	112 min
DL 3885flown by SkyWest	GRR 08:15	DTW 09:19	1h 04m	55	91%	0.0%	55 min
DL 4085flown by SkyWest	GRR 08:16	DTW 09:14	58m	28	86%	0.0%	43 min
DL 3500flown by SkyWest	GRR 10:34	DTW 11:35	1h 01m	176	81%	0.0%	91 min
DL 5858flown by Republic	GRR 12:10	DTW 13:08	58m	31	94%	0.0%	52 min
DL 5473flown by Endeavor	GRR 12:10	DTW 13:13	1h 03m	52	71%	1.9%	70 min
DL 4086flown by SkyWest	GRR 14:21	DTW 15:19	58m	31	87%	0.0%	88 min
DL 5390flown by Endeavor	GRR 14:35	DTW 15:38	1h 03m	69	67%	0.0%	80 min
DL 5511flown by Endeavor	GRR 17:55	DTW 18:59	1h 04m	49	70%	6.1%	93 min
DL 3531flown by SkyWest	GRR 17:55	DTW 18:59	1h 04m	29	83%	0.0%	88 min
DL 5800flown by Republic	GRR 19:41	DTW 20:45	1h 04m	42	93%	0.0%	43 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	GRR	DTW	1h 01m	79%	1.0%	2,318	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