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 SLC → HOU flights land within a few points of 84% on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	SLC	HOU	3h 00m	84%	0.2%	408	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 1 h ahead of Salt Lake City). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	SLC 06:15 → PHX 06:55WN 3751	1h 10m Phoenix	PHX 08:05 → HOU 12:40WN 2833	5h 25m	96%	91%
Delta Details →	SLC 23:35 → ATL 05:15DL 912	3h 05m Atlanta	ATL 08:20 → HOU 09:28 +1DL 1509	8h 49m	100%	86%
Southwest Details →	SLC 05:42 → DEN 07:08WN 3737	3h 07m Denver	DEN 10:15 → HOU 13:55WN 1543	7h 13m	100%	79%
Southwest Details →	SLC 07:45 → DEN 09:15WN 3738	3h 15m Denver	DEN 12:30 → HOU 16:05WN 1544	7h 20m	100%	79%
Delta Details →	SLC 07:00 → ATL 12:44DL 907	2h 27m Atlanta	ATL 15:11 → HOU 16:23DL 2381	8h 25m	99%	78%
Southwest Details →	SLC 05:00 → DAL 08:30WN 1725	2h 00m Dallas	DAL 10:30 → HOU 11:45WN 23	5h 45m	100%	77%
Southwest Details →	SLC 06:25 → LAS 06:50WN 4205	55m Las Vegas	LAS 07:45 → HOU 12:55WN 981	5h 28m	100%	76%
American Details →	SLC 05:00 → DFW 08:46AA 1214	2h 05m Dallas-Fort Worth	DFW 10:51 → HOU 12:16AA 6413 · flown by SkyWest	6h 16m	99%	76%
Tight connection: often missed
Southwest Details →	SLC 17:20 → DAL 20:55WN 3736	1h 05m Dallas	DAL 22:00 → HOU 23:12WN 63	4h 52m	52%	28%

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

LAS · 55m · leaves 06:25 0%

PHX · 1h 10m · leaves 06:15 4%

MDW · 55m · leaves 06:55 5%

Afternoon and evening

ATL · 1h 12m · leaves 13:35 12%

MDW · 1h 10m · leaves 14:05 20%

DAL · 1h 05m · leaves 17:20 48%

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.


Delta DL 2069 SLC 23:36 → MCO Southwest WN 2637 MCO 08:05 → HOU Connection details →	2h 05m	8h 59m	92%	86%
United UA 5683 SLC 05:15 → DEN Southwest WN 1543 DEN 10:15 → HOU Connection details →	3h 21m	7h 40m	99%	80%
Delta DL 1317 SLC 07:45 → DEN Southwest WN 1544 DEN 12:30 → HOU Connection details →	3h 12m	7h 20m	99%	78%

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