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 80-minute layover misses 6% of the time at 10 am and 1 time in 5 at 9 pm.

Nonstops


United	IAH	STL	2h 08m	82%	0.9%	1,257	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach St Louis on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


United Details →	IAH 05:04 → ORD 07:59UA 1044	2h 41m Chicago	ORD 10:40 → STL 12:11UA 1355	7h 07m	100%	89%
United Details →	IAH 08:30 → DEN 10:05UA 2816	3h 20m Denver	DEN 13:25 → STL 16:33UA 1639	8h 03m	100%	87%
Delta Details →	IAH 08:05 → ATL 11:09DL 644	3h 00m Atlanta	ATL 14:09 → STL 14:48DL 2700	6h 45m	100%	87%
United Details →	IAH 05:15 → DEN 06:47UA 1874	2h 48m Denver	DEN 09:35 → STL 12:42UA 652	7h 27m	99%	83%
Delta Details →	IAH 05:40 → ATL 08:43DL 1069	3h 09m Atlanta	ATL 11:52 → STL 12:34DL 566	6h 50m	99%	79%
American Details →	IAH 06:13 → ORD 09:07AA 3106	3h 25m Chicago	ORD 12:32 → STL 13:55AA 3815 · flown by Envoy	7h 42m	99%	79%
Delta Details →	IAH 16:51 → ATL 20:13DL 2890	2h 57m Atlanta	ATL 23:10 → STL 23:53DL 1403	7h 05m	96%	78%
Delta Details →	IAH 05:20 → DTW 09:11DL 1389	3h 17m Detroit	DTW 12:28 → STL 13:05DL 1371	7h 45m	99%	78%
Tight connection: often missed
American Details →	IAH 11:26 → ORD 14:17AA 1909	50m Chicago	ORD 15:07 → STL 16:40AA 4537 · flown by Republic	5h 14m	53%	39%
American Details →	IAH 18:42 → ORD 21:54AA 1913	1h 06m Chicago	ORD 23:00 → STL 00:16 +1AA 1004	5h 34m	51%	27%
United Details →	IAH 16:47 → EWR 21:29UA 700	48m Newark	EWR 22:17 → STL 23:44UA 1527	6h 57m	52%	26%

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 01m · leaves 05:04 3%

CLT · 1h 17m · leaves 06:01 6%

Afternoon and evening

DFW · 1h 12m · leaves 14:04 44%

EWR · 48m · leaves 16:47 48%

ORD · 1h 06m · leaves 18:42 49%

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.


United UA 1874 IAH 05:15 → DEN Southwest WN 1753 DEN 10:05 → STL Connection details →	3h 18m	8h 05m	97%	93%
United UA 1030 IAH 07:20 → ATL Delta DL 2700 ATL 14:09 → STL Connection details →	3h 30m	7h 30m	99%	88%
United UA 2266 IAH 08:00 → MCI Southwest WN 2083 MCI 13:45 → STL Connection details →	3h 42m	6h 50m	100%	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