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

No clear winner: Southwest’s STL → HOU flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops


Southwest	STL	HOU	2h 10m	79%	0.3%	1,539	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.


Southwest Details →	STL 05:45 → PHX 06:55WN 3967	1h 10m Phoenix	PHX 08:05 → HOU 12:40WN 2833	6h 55m	100%	94%
Southwest Details →	STL 05:05 → MCO 08:25WN 4358	1h 15m Orlando	MCO 09:40 → HOU 11:10WN 3174	6h 05m	100%	90%
Southwest Details →	STL 08:10 → MCI 09:15WN 3943	2h 40m Kansas City	MCI 11:55 → HOU 14:05WN 2555	5h 55m	100%	84%
Southwest Details →	STL 05:40 → MDW 06:45WN 1008	3h 25m Chicago	MDW 10:10 → HOU 12:50WN 2783	7h 10m	100%	84%
Delta Details →	STL 06:00 → ATL 08:38DL 1524	2h 27m Atlanta	ATL 11:05 → HOU 12:11DL 1195	6h 12m	99%	82%
Southwest Details →	STL 05:45 → DEN 07:00WN 3909	3h 15m Denver	DEN 10:15 → HOU 13:55WN 1543	8h 10m	100%	81%
Southwest Details →	STL 05:05 → DAL 06:45WN 1396	3h 45m Dallas	DAL 10:30 → HOU 11:45WN 23	6h 40m	100%	80%
Southwest Details →	STL 05:40 → LGA 09:00WN 4939	1h 30m New York	LGA 10:30 → HOU 13:20WN 1711	7h 40m	98%	79%
Tight connection: often missed
Southwest Details →	STL 15:35 → MDW 16:40WN 556	1h 00m Chicago	MDW 17:40 → HOU 20:15WN 2785	4h 40m	61%	32%
Southwest Details →	STL 16:00 → DEN 17:20WN 3912	1h 20m Denver	DEN 18:40 → HOU 22:15WN 606	6h 15m	70%	23%
Southwest Details →	STL 14:50 → MCO 18:20WN 3948	1h 15m Orlando	MCO 19:35 → HOU 21:00WN 4493	6h 10m	52%	17%

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 10m · leaves 05:45 0%

MCO · 1h 15m · leaves 05:05 0%

ATL · 1h 20m · leaves 07:08 3%

Afternoon and evening

DEN · 1h 20m · leaves 16:00 30%

DFW · 1h 18m · leaves 19:22 47%

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 236 STL 10:00 → ATL Delta DL 2381 ATL 15:11 → HOU Connection details →	2h 36m	6h 25m	96%	76%
United UA 2459 STL 09:06 → DEN Southwest WN 1544 DEN 12:30 → HOU Connection details →	2h 00m	6h 59m	92%	72%
Delta DL 1400 STL 10:51 → ATL Southwest WN 206 ATL 16:05 → HOU Connection details →	2h 40m	6h 24m	95%	61%

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