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

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

Nonstops (seasonal or thin)


United	GRR	IAH	3h 06m	79%	0.8%	366	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Houston on time. Total trip = scheduled departure to arrival, layover included (Houston is 1 h behind Grand Rapids). Layovers up to 4 hours. Pick a connection for the details.


Delta + Unitedtwo ticketsDetails →	GRR 06:10 → ATL 08:14DL 2453	3h 23m Atlanta	ATL 11:37 → IAH 12:47UA 425	7h 37m	99%	87%
American + Unitedtwo ticketsDetails →	GRR 06:01 → CLT 07:57AA 3230	3h 51m Charlotte	CLT 11:48 → IAH 13:34UA 6236 · flown by Mesa	8h 33m	97%	87%
United Details →	GRR 06:00 → ORD 06:17UA 4458 · flown by GoJet	1h 18m Chicago	ORD 07:35 → IAH 10:36UA 1231	5h 36m	96%	86%
Delta Details →	GRR 07:53 → ATL 09:56DL 2161	2h 34m Atlanta	ATL 12:30 → IAH 13:38DL 1572	6h 45m	95%	81%
American + Unitedtwo ticketsDetails →	GRR 06:00 → DCA 07:48AA 5301 · flown by PSA	3h 10m Washington	DCA 10:58 → IAH 13:19UA 2190	8h 19m	97%	78%
American + Unitedtwo ticketsDetails →	GRR 10:10 → ORD 10:32AA 6391 · flown by SkyWest	2h 08m Chicago	ORD 12:40 → IAH 15:40UA 1448	6h 30m	91%	78%
Delta Details →	GRR 05:30 → DTW 06:30DL 4885 · flown by Endeavor	2h 10m Detroit	DTW 08:40 → IAH 10:36DL 1043	6h 06m	95%	78%
Delta + Unitedtwo ticketsDetails →	GRR 06:00 → LGA 08:04DL 5806 · flown by Republic	2h 11m New York	LGA 10:15 → IAH 13:06UA 2617	8h 06m	98%	77%
Tight connection: often missed
American Details →	GRR 17:34 → CLT 19:39AA 1891	1h 06m Charlotte	CLT 20:45 → IAH 22:27AA 1840	5h 53m	67%	45%
United Details →	GRR 15:37 → DEN 16:30UA 2745	48m Denver	DEN 17:18 → IAH 20:55UA 1585	6h 18m	61%	45%
American Details →	GRR 07:01 → DFW 08:48AA 1561	47m Dallas-Fort Worth	DFW 09:35 → IAH 10:53AA 3591 · flown by Envoy	4h 52m	63%	42%

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

ORD · 1h 17m · leaves 06:00 5%

DEN · 1h 13m · leaves 08:00 18%

DTW · 55m · leaves 10:34 22%

Afternoon and evening

CLT · 1h 06m · leaves 17:34 33%

ORD · 1h 14m · leaves 18:25 38%

DEN · 48m · leaves 15:37 39%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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