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 23% of the time at 8 pm.

Nonstops


United	STL	IAH	2h 19m	84%	1.0%	1,260	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 →	STL 07:20 → ORD 09:00UA 4423 · flown by GoJet	3h 40m Chicago	ORD 12:40 → IAH 15:40UA 1448	8h 20m	99%	86%
United Details →	STL 06:00 → ORD 07:30UA 2805	2h 55m Chicago	ORD 10:25 → IAH 13:23UA 2638	7h 23m	97%	84%
United Details →	STL 05:10 → DEN 06:32UA 362	1h 10m Denver	DEN 07:42 → IAH 11:15UA 1720	6h 05m	93%	84%
Delta Details →	STL 06:00 → ATL 08:38DL 1524	3h 52m Atlanta	ATL 12:30 → IAH 13:38DL 1572	7h 38m	99%	83%
American Details →	STL 09:08 → ORD 10:36AA 4104 · flown by Envoy	2h 53m Chicago	ORD 13:29 → IAH 16:27AA 4426 · flown by Republic	7h 17m	99%	80%
United Details →	STL 10:20 → ORD 11:52UA 4517 · flown by GoJet	2h 23m Chicago	ORD 14:15 → IAH 17:20UA 2451	7h 00m	99%	76%
Delta Details →	STL 06:21 → MSP 07:57DL 1597	2h 27m Minneapolis	MSP 10:24 → IAH 13:15DL 2673	6h 56m	98%	76%
Delta Details →	STL 13:54 → DTW 16:30DL 1371	3h 55m Detroit	DTW 20:25 → IAH 22:24DL 1633	8h 30m	95%	74%
Tight connection: often missed
Delta Details →	STL 15:57 → MSP 17:40DL 4167 · flown by SkyWest	1h 00m Minneapolis	MSP 18:40 → IAH 21:37DL 2683	5h 40m	64%	46%
United Details →	STL 16:48 → DEN 18:23UA 1483	1h 12m Denver	DEN 19:35 → IAH 23:06UA 475	6h 18m	61%	46%
American Details →	STL 17:13 → DFW 19:15AA 2712	1h 55m Dallas-Fort Worth	DFW 21:10 → IAH 22:24AA 2209	5h 11m	56%	24%

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

DFW · 1h 06m · leaves 05:30 6%

DEN · 1h 10m · leaves 05:10 7%

LGA · 1h 16m · leaves 06:05 7%

Afternoon and evening

ATL · 1h 18m · leaves 17:06 23%

MSP · 1h 00m · leaves 15:57 36%

DEN · 1h 12m · leaves 16:48 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.


Southwest WN 4358 STL 05:05 → MCO United UA 1493 MCO 11:57 → IAH Connection details →	3h 32m	8h 24m	100%	95%
Southwest WN 3899 STL 12:50 → CLE United UA 1645 CLE 18:41 → IAH Connection details →	3h 21m	8h 05m	100%	92%
American AA 858 STL 05:10 → CLT United UA 6236 CLT 11:48 → IAH Connection details →	3h 45m	8h 24m	99%	88%

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