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 DAL → HOU flights land within a few points of 3 in 4 on time whatever the hour.

Nonstops


Southwest	DAL	HOU	1h 15m	76%	1.9%	4,053	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 →	DAL 06:00 → PHX 06:28WN 1379	1h 37m Phoenix	PHX 08:05 → HOU 12:40WN 2833	6h 40m	100%	91%
Southwest Details →	DAL 06:20 → MSY 07:45WN 1466	1h 25m New Orleans	MSY 09:10 → HOU 10:25WN 934	4h 05m	98%	86%
Southwest Details →	DAL 06:00 → MDW 08:15WN 1355	1h 55m Chicago	MDW 10:10 → HOU 12:50WN 2783	6h 50m	100%	86%
Southwest Details →	DAL 08:35 → MCI 10:10WN 1343	1h 45m Kansas City	MCI 11:55 → HOU 14:05WN 2555	5h 30m	100%	82%
Southwest Details →	DAL 06:40 → ELP 07:15WN 1309	3h 45m El Paso	ELP 11:00 → HOU 14:00WN 1800	7h 20m	98%	82%
Southwest Details →	DAL 07:40 → MAF 09:00WN 801	50m Midland	MAF 09:50 → HOU 11:20WN 2524	3h 40m	95%	82%
Southwest Details →	DAL 08:25 → TUL 09:30WN 4445	2h 55m Tulsa	TUL 12:25 → HOU 14:05WN 680	5h 40m	100%	81%
Delta Details →	DAL 06:05 → ATL 09:15DL 516	1h 50m Atlanta	ATL 11:05 → HOU 12:11DL 1195	6h 07m	96%	78%
Tight connection: often missed
Southwest Details →	DAL 16:00 → SAT 17:05WN 1401	1h 25m San Antonio	SAT 18:30 → HOU 19:35WN 3573	3h 35m	71%	43%
Southwest Details →	DAL 17:55 → DEN 19:25WN 1303	1h 20m Denver	DEN 20:45 → HOU 00:45 +1WN 2026	6h 20m	62%	32%
Southwest Details →	DAL 12:52 → MSY 14:22WN 3790	53m New Orleans	MSY 15:15 → HOU 16:30WN 2998	3h 38m	38%	21%

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

MAF · 50m · leaves 07:40 5%

SLC · 1h 15m · leaves 07:00 8%

LAS · 55m · leaves 06:05 10%

Afternoon and evening

MDW · 1h 20m · leaves 14:05 25%

DEN · 1h 20m · leaves 17:55 38%

TPA · 1h 00m · leaves 16:10 54%

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 1261 DAL 06:00 → ATL Delta DL 1195 ATL 11:05 → HOU Connection details →	2h 00m	6h 12m	98%	83%
Southwest WN 1766 DAL 09:30 → ATL Delta DL 2381 ATL 15:11 → HOU Connection details →	2h 36m	6h 55m	100%	77%
Delta DL 441 DAL 10:09 → ATL Southwest WN 206 ATL 16:05 → HOU Connection details →	2h 45m	7h 06m	96%	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