Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: Delta’s GRR → DTW flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops


Delta	GRR	DTW	1h 01m	79%	1.0%	2,318	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Detroit on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


United Details →	GRR 06:00 → ORD 06:17UA 4458 · flown by GoJet	1h 03m Chicago	ORD 07:20 → DTW 09:52UA 1344	3h 52m	92%	87%
Southwest Details →	GRR 06:30 → MDW 06:40WN 1894	1h 15m Chicago	MDW 07:55 → DTW 10:05WN 1775	3h 35m	100%	85%
American Details →	GRR 06:00 → ORD 06:07AA 2502	3h 53m Chicago	ORD 10:00 → DTW 12:32AA 3498 · flown by Envoy	6h 34m	97%	83%
Delta Details →	GRR 06:10 → ATL 08:14DL 2453	2h 46m Atlanta	ATL 11:00 → DTW 12:55DL 1240	6h 46m	99%	83%
American Details →	GRR 06:00 → ORD 06:13AA 1391	1h 17m Chicago	ORD 07:30 → DTW 10:03AA 4103 · flown by Envoy	4h 04m	95%	83%
Delta Details →	GRR 06:00 → LGA 08:04DL 5806 · flown by Republic	1h 21m New York	LGA 09:25 → DTW 11:25DL 1078	5h 24m	98%	81%
Delta Details →	GRR 07:00 → MSP 07:33DL 2913	1h 27m Minneapolis	MSP 09:00 → DTW 11:43DL 1433	4h 43m	91%	80%
American Details →	GRR 06:01 → CLT 07:57AA 3230	3h 18m Charlotte	CLT 11:15 → DTW 13:01AA 1781	7h 00m	98%	79%
Tight connection: often missed
United Details →	GRR 13:56 → ORD 14:05UA 2138	55m Chicago	ORD 15:00 → DTW 17:39UA 5867 · flown by SkyWest	3h 43m	67%	52%
American Details →	GRR 17:34 → CLT 19:39AA 1891	1h 07m Charlotte	CLT 20:46 → DTW 22:34AA 419	5h 00m	67%	43%
Delta Details →	GRR 17:56 → LGA 20:00DL 5104 · flown by Endeavor	1h 00m New York	LGA 21:00 → DTW 23:10DL 1014	5h 14m	67%	40%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

MDW · 1h 15m · leaves 06:30 0%

ORD · 1h 17m · leaves 06:00 5%

ATL · 1h 04m · leaves 06:10 9%

Afternoon and evening

LGA · 1h 00m · leaves 17:56 33%

CLT · 1h 07m · leaves 17:34 33%

ORD · 59m · leaves 18:25 51%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.


United UA 4458 GRR 06:00 → ORD American AA 3498 ORD 10:00 → DTW Connection details →	3h 43m	6h 34m	100%	86%
Southwest WN 1894 GRR 06:30 → MDW Delta DL 4674 MDW 09:17 → DTW Connection details →	2h 37m	5h 05m	100%	84%
Southwest WN 1926 GRR 05:30 → BWI Delta DL 2341 BWI 09:39 → DTW Connection details →	2h 29m	5h 37m	97%	82%

Rank all connections, any airlines →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

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