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

No clear winner: airlines and hours on this route all land within a few points of 87% on time.

Nonstops


Delta	LAX	SJC	1h 16m	91%	0.8%	2,259	Flying now
Southwest	LAX	SJC	1h 15m	82%	0.8%	1,844	Flying now
Frontier	LAX	SJC	1h 17m	81%	3.4%	117	Flying now
Alaska	LAX	SJC	1h 23m	87%	1.5%	525	Not flying now
United	LAX	SJC	–	100%few flights	0.0%	1	Not flying now
American	LAX	SJC	–	70%few flights	0.0%	10	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Jose on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	LAX 05:05 → PHX 06:30WN 116	3h 10m Phoenix	PHX 09:40 → SJC 11:35WN 3336	6h 30m	100%	96%
Delta Details →	LAX 05:35 → SLC 08:30DL 2906	3h 10m Salt Lake City	SLC 11:40 → SJC 12:38DL 1254	7h 03m	99%	90%
Delta Details →	LAX 09:55 → SLC 12:50DL 1434	2h 21m Salt Lake City	SLC 15:11 → SJC 16:07DL 1260	6h 12m	98%	87%
Alaska Details →	LAX 07:00 → PDX 09:21AS 668	2h 24m Portland	PDX 11:45 → SJC 13:35AS 1632	6h 35m	99%	87%
Alaska Details →	LAX 09:00 → SEA 11:52AS 482	2h 26m Seattle	SEA 14:18 → SJC 16:32AS 1366	7h 32m	96%	86%
Southwest Details →	LAX 08:55 → PHX 10:25WN 2419	3h 30m Phoenix	PHX 13:55 → SJC 15:42WN 4102	6h 48m	100%	84%
Delta Details →	LAX 09:40 → SEA 12:30DL 1714	2h 15m Seattle	SEA 14:45 → SJC 17:04DL 3897 · flown by SkyWest	7h 24m	98%	83%
Southwest Details →	LAX 09:35 → LAS 10:45WN 2007	2h 00m Las Vegas	LAS 12:45 → SJC 14:20WN 4223	4h 45m	100%	81%
Tight connection: often missed
Alaska Details →	LAX 11:23 → PDX 13:44AS 1355	46m Portland	PDX 14:30 → SJC 16:25AS 3210 · flown by SkyWest	5h 02m	67%	64%
Southwest Details →	LAX 17:00 → LAS 18:15WN 1571	1h 00m Las Vegas	LAS 19:15 → SJC 20:45WN 3865	3h 45m	34%	15%
Southwest Details →	LAX 14:45 → DEN 18:05WN 2392	50m Denver	DEN 18:55 → SJC 20:25WN 1727	5h 42m	26%	7%

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

SEA · 1h 19m · leaves 07:00 4%

DEN · 1h 16m · leaves 07:00 7%

Afternoon and evening

SEA · 1h 14m · leaves 16:25 16%

LAS · 1h 00m · leaves 17:00 66%

DEN · 50m · leaves 14:45 74%

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.


Frontier F9 4499 LAX 09:18 → PDX Alaska AS 3210 PDX 14:30 → SJC Connection details →	2h 49m	7h 07m	100%	96%
American AA 2027 LAX 06:19 → PHX Southwest WN 3336 PHX 09:40 → SJC Connection details →	1h 49m	5h 16m	95%	91%
American AA 6425 LAX 08:10 → LAS Southwest WN 1242 LAS 12:10 → SJC Connection details →	2h 37m	5h 35m	100%	90%

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