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

No clear winner: airlines and hours on this route all land within a few points of 87% on time.

Nonstops


Delta	GRR	ATL	2h 04m	87%	1.4%	1,385	Flying now
Frontier	GRR	ATL	2h 14m	73%	2.4%	42	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	GRR 05:30 → BWI 07:10WN 1926	1h 10m Baltimore	BWI 08:20 → ATL 10:20WN 3931	4h 48m	97%	89%
Southwest Details →	GRR 06:30 → MDW 06:40WN 1894	2h 15m Chicago	MDW 08:55 → ATL 11:45WN 4154	5h 15m	100%	86%
United Details →	GRR 07:15 → ORD 07:28UA 2099	3h 01m Chicago	ORD 10:29 → ATL 13:44UA 2684	6h 29m	96%	82%
Delta Details →	GRR 07:00 → MSP 07:33DL 2913	3h 07m Minneapolis	MSP 10:40 → ATL 14:05DL 1046	7h 05m	98%	82%
Delta Details →	GRR 05:30 → DTW 06:30DL 4885 · flown by Endeavor	3h 55m Detroit	DTW 10:25 → ATL 12:25DL 2856	6h 53m	96%	81%
United Details →	GRR 06:00 → ORD 06:17UA 4458 · flown by GoJet	2h 50m Chicago	ORD 09:07 → ATL 12:22UA 530	6h 22m	100%	81%
American Details →	GRR 06:01 → CLT 07:57AA 3230	1h 13m Charlotte	CLT 09:10 → ATL 10:41AA 5039 · flown by PSA	4h 40m	92%	80%
Delta Details →	GRR 06:00 → LGA 08:04DL 5806 · flown by Republic	2h 55m New York	LGA 10:59 → ATL 13:20DL 993	7h 20m	100%	77%
Tight connection: often missed
Delta Details →	GRR 10:34 → DTW 11:35DL 3500 · flown by SkyWest	50m Detroit	DTW 12:25 → ATL 14:23DL 2188	3h 49m	74%	53%
American Details →	GRR 07:01 → DFW 08:48AA 1561	46m Dallas-Fort Worth	DFW 09:34 → ATL 12:46AA 1358	5h 45m	62%	43%
American Details →	GRR 13:14 → DFW 15:00AA 3167	1h 00m Dallas-Fort Worth	DFW 16:00 → ATL 19:11AA 1379	5h 57m	73%	23%

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

CLT · 1h 13m · leaves 06:01 8%

LGA · 56m · leaves 06:00 8%

DTW · 1h 06m · leaves 08:15 9%

Afternoon and evening

DFW · 1h 00m · leaves 13:14 27%

LGA · 1h 01m · leaves 13:23 28%

CLT · 50m · leaves 17:34 48%

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 Delta DL 1178 ORD 09:45 → ATL Connection details →	3h 28m	6h 51m	100%	85%
Southwest WN 1926 GRR 05:30 → BWI Delta DL 1592 BWI 10:33 → ATL Connection details →	3h 23m	6h 54m	97%	85%
American AA 5494 GRR 06:44 → PHL Delta DL 2270 PHL 12:02 → ATL Connection details →	3h 18m	7h 22m	98%	78%

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