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

Connect in the morning. The same one-hour layover misses 14% of the time at 10 am and 1 time in 3 at 10 pm.

Nonstops (seasonal or thin)


United	CMH	IAH	3h 05m	81%	1.2%	993	Flying now

Best connections, one ticket

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 Columbus). Layovers up to 4 hours. Pick a connection for the details.


United Details →	CMH 05:30 → ORD 06:09UA 3524 · flown by Republic	1h 26m Chicago	ORD 07:35 → IAH 10:36UA 1231	6h 06m	97%	86%
United Details →	CMH 07:00 → ORD 07:39UA 3429 · flown by Republic	2h 46m Chicago	ORD 10:25 → IAH 13:23UA 2638	7h 23m	98%	85%
Delta Details →	CMH 07:05 → ATL 08:42DL 2909	3h 48m Atlanta	ATL 12:30 → IAH 13:38DL 1572	7h 33m	99%	84%
United Details →	CMH 09:00 → ORD 09:36UA 466	3h 04m Chicago	ORD 12:40 → IAH 15:40UA 1448	7h 40m	98%	81%
United Details →	CMH 08:19 → EWR 10:12UA 3416 · flown by Republic	2h 24m Newark	EWR 12:36 → IAH 15:34UA 2204	8h 15m	96%	80%
Delta Details →	CMH 06:00 → ATL 07:36DL 2469	2h 29m Atlanta	ATL 10:05 → IAH 11:18DL 1682	6h 18m	97%	78%
Delta Details →	CMH 06:30 → DTW 07:39DL 5701 · flown by Republic	1h 01m Detroit	DTW 08:40 → IAH 10:36DL 1043	5h 06m	94%	77%
American Details →	CMH 10:22 → ORD 11:00AA 4953 · flown by SkyWest	2h 29m Chicago	ORD 13:29 → IAH 16:27AA 4426 · flown by Republic	7h 03m	97%	77%
Tight connection: often missed
United Details →	CMH 09:00 → ORD 09:36UA 466	49m Chicago	ORD 10:25 → IAH 13:23UA 2638	5h 23m	63%	52%
American Details →	CMH 08:29 → ORD 09:10AA 3572 · flown by Envoy	50m Chicago	ORD 10:00 → IAH 12:46AA 1915	5h 17m	69%	46%
American Details →	CMH 20:05 → DFW 21:48AA 2337	59m Dallas-Fort Worth	DFW 22:47 → IAH 23:58AA 1914	4h 53m	65%	27%

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

DTW · 1h 01m · leaves 06:30 6%

ORD · 1h 12m · leaves 07:00 7%

MIA · 48m · leaves 05:08 7%

Afternoon and evening

DTW · 55m · leaves 14:07 15%

CLT · 1h 10m · leaves 15:44 23%

DFW · 59m · leaves 20:05 35%

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.


Southwest WN 2996 CMH 07:35 → TPA United UA 2421 TPA 11:55 → IAH Connection details →	2h 10m	6h 47m	100%	87%
Southwest WN 1193 CMH 05:10 → MCO United UA 2611 MCO 09:10 → IAH Connection details →	1h 50m	6h 35m	98%	86%
American AA 3667 CMH 07:00 → MIA United UA 470 MIA 12:29 → IAH Connection details →	2h 45m	8h 23m	99%	86%

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