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 88% on time.

Nonstops


Delta	SLC	SJC	2h 03m	89%	0.3%	1,591	Flying now
Southwest	SLC	SJC	2h 00m	78%	0.9%	212	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 (San Jose is 1 h behind Salt Lake City). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	SLC 09:40 → LAX 10:42DL 1095	3h 50m Los Angeles	LAX 14:32 → SJC 15:46DL 3822 · flown by SkyWest	7h 06m	100%	95%
Southwest Details →	SLC 06:15 → PHX 06:55WN 3751	2h 45m Phoenix	PHX 09:40 → SJC 11:35WN 3336	6h 20m	98%	94%
Southwest Details →	SLC 08:20 → LGB 09:30WN 543	2h 30m Long Beach	LGB 12:00 → SJC 13:10WN 4973	5h 50m	100%	93%
Alaska Details →	SLC 11:22 → PDX 12:23AS 2333 · flown by Horizon	2h 07m Portland	PDX 14:30 → SJC 16:25AS 3210 · flown by SkyWest	6h 03m	95%	92%
Alaska Details →	SLC 08:20 → PDX 09:26AS 3004 · flown by SkyWest	2h 19m Portland	PDX 11:45 → SJC 13:35AS 1632	6h 15m	100%	88%
Alaska Details →	SLC 11:17 → SEA 12:30AS 796	1h 48m Seattle	SEA 14:18 → SJC 16:32AS 1366	6h 15m	98%	86%
Delta Details →	SLC 15:40 → LAX 16:36DL 841	1h 40m Los Angeles	LAX 18:16 → SJC 19:32DL 3883 · flown by SkyWest	4h 55m	96%	84%
Delta Details →	SLC 11:30 → LAX 12:30DL 829	3h 30m Los Angeles	LAX 16:00 → SJC 17:17DL 1438	6h 47m	99%	84%
Tight connection: often missed
Alaska Details →	SLC 19:39 → PDX 20:43AS 3280 · flown by SkyWest	47m Portland	PDX 21:30 → SJC 23:21AS 678	4h 42m	63%	51%
Southwest Details →	SLC 14:50 → LAS 15:15WN 4338	50m Las Vegas	LAS 16:05 → SJC 17:40WN 2350	3h 45m	29%	19%
American Details →	SLC 16:42 → DFW 20:30AA 2594	54m Dallas-Fort Worth	DFW 21:24 → SJC 22:58AA 1940	7h 16m	34%	18%

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

SAN · 1h 05m · leaves 07:40 7%

DEN · 1h 18m · leaves 08:30 10%

DFW · 1h 16m · leaves 07:00 10%

Afternoon and evening

PHX · 1h 14m · leaves 18:50 37%

DFW · 54m · leaves 16:42 66%

LAS · 50m · leaves 14:50 71%

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.


Southwest WN 3746 SLC 11:20 → LAX Delta DL 3822 LAX 14:32 → SJC Connection details →	2h 17m	5h 26m	100%	95%
Delta DL 1209 SLC 11:15 → PDX Alaska AS 3210 PDX 14:30 → SJC Connection details →	2h 20m	6h 10m	96%	91%
Delta DL 1198 SLC 08:00 → SNA Southwest WN 3861 SNA 12:00 → SJC Connection details →	3h 03m	6h 25m	99%	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