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 PHX → HOU flights land within a few points of 73% on time whatever the hour.

Nonstops


Southwest	PHX	HOU	2h 25m	73%	0.5%	2,119	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 (Houston is 2 h ahead of Phoenix). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	PHX 06:05 → MCI 10:35WN 2563	1h 20m Kansas City	MCI 11:55 → HOU 14:05WN 2555	6h 00m	100%	84%
Delta Details →	PHX 23:59 → ATL 06:39DL 929	1h 41m Atlanta	ATL 08:20 → HOU 09:28 +1DL 1509	7h 25m	96%	83%
Southwest Details →	PHX 23:55 → MDW 05:10WN 3298	1h 30m Chicago	MDW 06:40 → HOU 09:15 +1WN 4497	7h 20m	93%	82%
Southwest Details →	PHX 06:15 → DEN 09:00WN 1706	1h 15m Denver	DEN 10:15 → HOU 13:55WN 1543	5h 40m	98%	79%
Southwest Details →	PHX 07:50 → ELP 10:05WN 3889	55m El Paso	ELP 11:00 → HOU 14:00WN 1800	4h 10m	94%	78%
Southwest Details →	PHX 05:05 → DAL 09:25WN 1357	1h 05m Dallas	DAL 10:30 → HOU 11:45WN 23	4h 40m	100%	77%
Southwest Details →	PHX 07:30 → LAS 08:40WN 2336	2h 45m Las Vegas	LAS 11:25 → HOU 16:35WN 4724	7h 05m	100%	76%
Southwest Details →	PHX 07:05 → DEN 09:50WN 116	2h 40m Denver	DEN 12:30 → HOU 16:05WN 1544	7h 00m	97%	76%
Tight connection: often missed
Southwest Details →	PHX 08:50 → DEN 11:35WN 3261	55m Denver	DEN 12:30 → HOU 16:05WN 1544	5h 15m	60%	47%
Southwest Details →	PHX 08:02 → STL 13:00WN 1467	50m St Louis	STL 13:50 → HOU 15:55WN 4752	5h 53m	63%	32%
Southwest Details →	PHX 12:45 → BNA 18:00WN 3237	55m Nashville	BNA 18:55 → HOU 21:02WN 534	6h 15m	50%	16%

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

DEN · 1h 15m · leaves 06:15 2%

SMF · 1h 15m · leaves 07:45 4%

DFW · 1h 06m · leaves 05:10 7%

Afternoon and evening

DAL · 1h 15m · leaves 14:50 24%

BNA · 55m · leaves 12:45 50%

DFW · 48m · leaves 17:15 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.


United UA 337 PHX 06:00 → DEN Southwest WN 1544 DEN 12:30 → HOU Connection details →	3h 38m	8h 05m	99%	78%
American AA 2004 PHX 07:45 → LAS Southwest WN 4724 LAS 11:25 → HOU Connection details →	2h 28m	6h 50m	97%	74%
American AA 2191 PHX 12:30 → MSY Southwest WN 4662 MSY 20:35 → HOU Connection details →	3h 01m	7h 20m	98%	70%

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