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 90-minute layover misses 2% of the time at 9 am and 31% of the time at 8 pm.

Nonstops (seasonal or thin)


United	IAH	CMH	2h 43m	82%	1.0%	993	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


United Details →	IAH 05:15 → DEN 06:47UA 1874	2h 48m Denver	DEN 09:35 → CMH 14:28UA 480	8h 13m	99%	91%
Delta Details →	IAH 15:27 → DTW 19:15DL 1865	3h 35m Detroit	DTW 22:50 → CMH 23:56DL 5634 · flown by Republic	7h 29m	100%	90%
Delta Details →	IAH 05:20 → DTW 09:11DL 1389	3h 07m Detroit	DTW 12:18 → CMH 13:27DL 5774 · flown by Republic	7h 07m	99%	87%
American Details →	IAH 05:10 → MIA 08:51AA 1047	1h 41m Miami	MIA 10:32 → CMH 13:25AA 4163 · flown by Envoy	7h 15m	98%	87%
United + Deltatwo ticketsDetails →	IAH 07:20 → ATL 10:39UA 1030	3h 46m Atlanta	ATL 14:25 → CMH 15:59DL 2200	7h 40m	100%	87%
Delta Details →	IAH 05:40 → ATL 08:43DL 1069	1h 27m Atlanta	ATL 10:10 → CMH 11:48DL 1522	5h 08m	98%	84%
United Details →	IAH 06:01 → EWR 10:36UA 1797	3h 39m Newark	EWR 14:15 → CMH 16:10UA 3492 · flown by Republic	9h 09m	100%	84%
United Details →	IAH 06:10 → ORD 09:05UA 2616	3h 43m Chicago	ORD 12:48 → CMH 15:28UA 3554 · flown by Republic	8h 18m	100%	83%
Tight connection: often missed
United Details →	IAH 13:41 → ORD 16:39UA 2458	1h 06m Chicago	ORD 17:45 → CMH 20:24UA 3674 · flown by Republic	5h 43m	73%	54%
Frontier Details →	IAH 13:16 → MCO 16:53F9 1418	47m Orlando	MCO 17:40 → CMH 20:13F9 2757	5h 55m	68%	42%
American Details →	IAH 11:26 → ORD 14:17AA 1909	47m Chicago	ORD 15:04 → CMH 17:38AA 3361 · flown by Envoy	5h 12m	50%	38%

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

IAD · 1h 17m · leaves 07:20 4%

DTW · 1h 04m · leaves 05:20 7%

DFW · 59m · leaves 05:02 11%

Afternoon and evening

MCO · 47m · leaves 13:16 32%

ORD · 1h 11m · leaves 13:36 40%

PHL · 56m · leaves 12:21 52%

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