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 86% on time.

Nonstops


Delta	SJC	LAX	1h 25m	93%	0.9%	2,259	Flying now
Frontier	SJC	LAX	1h 25m	79%	4.3%	117	Flying now
Southwest	SJC	LAX	1h 20m	79%	0.5%	1,844	Flying now
Alaska	SJC	LAX	1h 28m	88%	1.5%	529	Not flying now
United	SJC	LAX	–	100%few flights	0.0%	1	Not flying now
American	SJC	LAX	–	70%few flights	0.0%	10	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	SJC 17:01 → SLC 19:57DL 1260	2h 48m Salt Lake City	SLC 22:45 → LAX 23:46DL 2014	6h 45m	99%	95%
United Details →	SJC 08:45 → DEN 12:23UA 586	1h 03m Denver	DEN 13:26 → LAX 14:57UA 774	6h 12m	97%	88%
Alaska Details →	SJC 08:00 → PDX 09:44AS 679	1h 01m Portland	PDX 10:45 → LAX 13:20AS 695	5h 20m	100%	88%
Alaska Details →	SJC 14:31 → PDX 16:15AS 1633	1h 22m Portland	PDX 17:37 → LAX 20:09AS 278	5h 38m	98%	86%
Delta Details →	SJC 07:20 → SEA 09:49DL 4041 · flown by SkyWest	2h 46m Seattle	SEA 12:35 → LAX 15:26DL 2914	8h 06m	99%	85%
Delta Details →	SJC 06:00 → SLC 08:55DL 1314	2h 35m Salt Lake City	SLC 11:30 → LAX 12:30DL 829	6h 30m	98%	84%
Alaska Details →	SJC 08:20 → SEA 10:31AS 1426	2h 07m Seattle	SEA 12:38 → LAX 15:25AS 502	7h 05m	96%	83%
Southwest Details →	SJC 07:40 → LAS 09:10WN 1277	3h 00m Las Vegas	LAS 12:10 → LAX 13:30WN 3168	5h 50m	100%	83%
Tight connection: often missed
Alaska Details →	SJC 18:37 → PDX 20:29AS 3030 · flown by SkyWest	58m Portland	PDX 21:27 → LAX 23:56AS 1389	5h 19m	73%	60%
Alaska Details →	SJC 12:03 → PDX 13:48AS 2188 · flown by Horizon	51m Portland	PDX 14:39 → LAX 17:06AS 713	5h 03m	51%	43%
Southwest Details →	SJC 16:05 → PHX 18:00WN 3266	55m Phoenix	PHX 18:55 → LAX 20:20WN 2438	4h 15m	35%	15%

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

PDX · 1h 01m · leaves 08:00 0%

AUS · 1h 15m · leaves 06:00 2%

Afternoon and evening

DFW · 1h 00m · leaves 11:47 25%

PDX · 58m · leaves 18:37 27%

PHX · 55m · leaves 16:05 65%

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 4026 SJC 09:45 → SLC United UA 5456 SLC 16:42 → LAX Connection details →	3h 54m	8h 08m	98%	95%
Southwest WN 2280 SJC 06:00 → LAS United UA 203 LAS 10:45 → LAX Connection details →	3h 10m	6h 05m	100%	92%
Southwest WN 3489 SJC 06:30 → SAN United UA 5384 SAN 10:49 → LAX Connection details →	2h 49m	5h 28m	100%	91%

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