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 92% on time.

Nonstops


Delta	SJC	SLC	1h 59m	94%	0.4%	1,589	Flying now
Southwest	SJC	SLC	1h 50m	81%	0.5%	212	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Salt Lake City on time. Total trip = scheduled departure to arrival, layover included (Salt Lake City is 1 h ahead of San Jose). Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	SJC 09:46 → PDX 11:31AS 2256 · flown by Horizon	2h 59m Portland	PDX 14:30 → SLC 17:29AS 3120 · flown by SkyWest	6h 43m	98%	92%
Alaska Details →	SJC 08:00 → PDX 09:44AS 679	1h 11m Portland	PDX 10:55 → SLC 13:59AS 3112 · flown by SkyWest	4h 59m	100%	92%
Delta Details →	SJC 14:59 → LAX 16:27DL 3842 · flown by SkyWest	2h 48m Los Angeles	LAX 19:15 → SLC 22:05DL 2973	6h 06m	99%	91%
Delta Details →	SJC 07:00 → LAX 08:27DL 1654	3h 14m Los Angeles	LAX 11:41 → SLC 14:30DL 1194	6h 34m	100%	90%
Delta Details →	SJC 09:55 → LAX 11:20DL 4451 · flown by SkyWest	1h 50m Los Angeles	LAX 13:10 → SLC 16:07DL 1647	5h 12m	98%	85%
Delta Details →	SJC 16:30 → LAX 17:56DL 3822 · flown by SkyWest	1h 19m Los Angeles	LAX 19:15 → SLC 22:04DL 1483	4h 34m	98%	84%
United Details →	SJC 08:45 → DEN 12:23UA 586	1h 17m Denver	DEN 13:40 → SLC 15:13UA 1840	5h 28m	99%	83%
Delta Details →	SJC 07:20 → SEA 09:49DL 4041 · flown by SkyWest	1h 16m Seattle	SEA 11:05 → SLC 14:11DL 1265	5h 51m	97%	82%
Tight connection: often missed
Alaska Details →	SJC 08:20 → SEA 10:31AS 1426	1h 20m Seattle	SEA 11:51 → SLC 15:04AS 733	5h 44m	71%	47%
Southwest Details →	SJC 17:00 → LAS 18:30WN 2266	1h 15m Las Vegas	LAS 19:45 → SLC 22:12WN 4225	4h 10m	69%	29%
American Details →	SJC 14:24 → DFW 20:06AA 436	1h 04m Dallas-Fort Worth	DFW 21:10 → SLC 22:59AA 2993	7h 35m	66%	29%

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 11m · leaves 08:00 0%

SEA · 1h 16m · leaves 07:20 3%

Afternoon and evening

LAX · 1h 19m · leaves 16:30 2%

DFW · 1h 04m · leaves 14:24 34%

LAS · 1h 12m · leaves 20:20 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.


Southwest WN 3661 SJC 12:10 → BUR Delta DL 3693 BUR 16:54 → SLC Connection details →	3h 34m	6h 45m	100%	95%
Southwest WN 4879 SJC 06:30 → ONT Delta DL 1302 ONT 09:40 → SLC Connection details →	1h 50m	4h 58m	98%	94%
Southwest WN 3693 SJC 06:30 → PDX Alaska AS 3112 PDX 10:55 → SLC Connection details →	2h 37m	6h 29m	100%	92%

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