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 2% of the time at 7 am and 38% of the time at 6 pm.

Nonstops


United	ORD	IAH	3h 00m	81%	0.7%	4,040	Flying now
Frontier	ORD	IAH	3h 17m	78%	3.8%	263	Flying now
Southwest	MDW	HOU	2h 40m	75%	1.2%	1,857	Flying now
American	ORD	IAH	2h 56m	68%	2.6%	1,537	Flying now
Frontier	MDW	IAH	2h 52m	79%	1.8%	113	Not flying now
Spirit	ORD	IAH	2h 50m	66%	4.4%	274	Not 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. Layovers up to 4 hours. Pick a connection for the details.


United Details →	ORD 07:15 → PIT 09:58UA 1285	3h 07m Pittsburgh	PIT 13:05 → IAH 15:08UA 1964	7h 53m	99%	97%
United Details →	ORD 06:00 → MCO 09:40UA 284	2h 17m Orlando	MCO 11:57 → IAH 13:29UA 1493	7h 29m	100%	95%
United Details →	ORD 12:45 → OKC 15:17UA 5999 · flown by SkyWest	3h 48m Oklahoma City	OKC 19:05 → IAH 20:48UA 3996 · flown by Mesa	8h 03m	99%	91%
United Details →	ORD 09:05 → CLE 11:41UA 3422 · flown by Republic	3h 30m Cleveland	CLE 15:11 → IAH 17:25UA 1545	8h 20m	100%	90%
United Details →	ORD 05:00 → DEN 06:42UA 2666	1h 00m Denver	DEN 07:42 → IAH 11:15UA 1720	6h 15m	98%	89%
United Details →	ORD 07:00 → DCA 09:59UA 482	3h 00m Washington	DCA 12:59 → IAH 15:18UA 382	8h 18m	100%	89%
Southwest Details →	MDW 05:20 → PHX 06:55WN 2858	1h 10m Phoenix	PHX 08:05 → HOU 12:40WN 2833	7h 20m	94%	88%
United Details →	ORD 07:11 → LAS 09:19UA 574	1h 06m Las Vegas	LAS 10:25 → IAH 15:40UA 1711	8h 29m	98%	88%
Tight connection: often missed
American Details →	ORD 14:24 → MIA 18:39AA 3148	1h 03m Miami	MIA 19:42 → IAH 21:33AA 2541	7h 09m	56%	35%
American Details →	ORD 16:51 → DFW 19:28AA 2988	1h 42m Dallas-Fort Worth	DFW 21:10 → IAH 22:24AA 2209	5h 33m	71%	32%
American Details →	ORD 14:59 → DFW 17:36AA 2257	1h 00m Dallas-Fort Worth	DFW 18:36 → IAH 19:54AA 1392	4h 55m	65%	30%

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

PHX · 1h 17m · leaves 09:02 1%

DEN · 1h 00m · leaves 05:00 2%

LAS · 1h 06m · leaves 07:11 2%

Afternoon and evening

IAD · 58m · leaves 18:12 46%

DEN · 48m · leaves 18:17 53%

DFW · 52m · leaves 13:25 56%

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 846 MDW 07:45 → PIT United UA 1964 PIT 13:05 → IAH Connection details →	2h 50m	7h 23m	100%	100%
Southwest WN 2815 MDW 05:10 → MCO United UA 1493 MCO 11:57 → IAH Connection details →	3h 17m	8h 19m	100%	95%
Southwest WN 2906 MDW 05:00 → TPA United UA 2421 TPA 11:55 → IAH Connection details →	3h 30m	8h 22m	100%	89%

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