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

No clear winner: United’s SJC → IAH flights land within a few points of 3 in 4 on time whatever the hour.

Nonstops (seasonal or thin)


United	SJC	IAH	3h 53m	76%	0.0%	215	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 San Jose). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	SJC 14:59 → LAX 16:27DL 3842 · flown by SkyWest	2h 08m Los Angeles	LAX 18:35 → IAH 23:59DL 1287	7h 00m	98%	81%
Alaska Details →	SJC 18:45 → SEA 21:00AS 481	2h 57m Seattle	SEA 23:57 → IAH 06:20 +1AS 398	9h 35m	98%	80%
Delta Details →	SJC 07:00 → LAX 08:27DL 1654	1h 13m Los Angeles	LAX 09:40 → IAH 15:04DL 1143	6h 05m	92%	79%
United Details →	SJC 08:45 → DEN 12:23UA 586	3h 12m Denver	DEN 15:35 → IAH 19:10UA 489	8h 25m	99%	77%
Delta Details →	SJC 09:45 → SLC 12:48DL 4026 · flown by SkyWest	57m Salt Lake City	SLC 13:45 → IAH 17:53DL 1299	6h 08m	95%	76%
Delta Details →	SJC 22:00 → ATL 05:34DL 2136	1h 56m Atlanta	ATL 07:30 → IAH 08:37 +1DL 1585	8h 37m	98%	76%
Delta Details →	SJC 13:40 → SLC 16:33DL 1254	1h 12m Salt Lake City	SLC 17:45 → IAH 21:52DL 2514	6h 12m	96%	75%
Delta Details →	SJC 06:20 → MSP 12:02DL 2156	2h 43m Minneapolis	MSP 14:45 → IAH 17:39DL 2644	9h 19m	98%	75%
Tight connection: often missed
American Details →	SJC 14:24 → DFW 20:06AA 436	1h 04m Dallas-Fort Worth	DFW 21:10 → IAH 22:24AA 2209	6h 00m	66%	31%

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

LAX · 1h 13m · leaves 07:00 8%

PHX · 49m · leaves 06:01 19%

Afternoon and evening

SLC · 1h 12m · leaves 13:40 4%

SEA · 1h 06m · leaves 14:16 23%

DFW · 1h 04m · leaves 14:24 34%

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 3883 SJC 20:19 → LAX United UA 491 LAX 00:51 → IAH Connection details →	2h 56m	7h 53m	99%	91%
Southwest WN 3632 SJC 06:00 → SEA United UA 2293 SEA 11:55 → IAH Connection details →	3h 35m	10h 35m	100%	90%
Southwest WN 3489 SJC 06:30 → SAN United UA 2165 SAN 10:13 → IAH Connection details →	2h 13m	7h 10m	100%	89%

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