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 84% on time.

Nonstops (seasonal or thin)


Alaska	SJC	BOI	1h 45m	88%	0.6%	359	Flying now
Southwest	SJC	BOI	1h 35m	80%	0.0%	330	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	SJC 06:00 → SLC 08:55DL 1314	2h 05m Salt Lake City	SLC 11:00 → BOI 12:15DL 1442	5h 17m	98%	89%
Southwest Details →	SJC 06:00 → LAS 07:35WN 2280	1h 00m Las Vegas	LAS 08:35 → BOI 11:25WN 2192	4h 25m	100%	89%
Delta Details →	SJC 07:00 → LAX 08:27DL 1654	3h 17m Los Angeles	LAX 11:44 → BOI 14:46DL 3773 · flown by SkyWest	6h 51m	100%	89%
Alaska Details →	SJC 10:19 → SEA 12:30AS 1311	3h 15m Seattle	SEA 15:45 → BOI 18:11AS 2061 · flown by Horizon	6h 52m	100%	89%
American Details →	SJC 06:01 → PHX 08:05AA 1694	2h 05m Phoenix	PHX 10:10 → BOI 13:27AA 4948 · flown by SkyWest	6h 26m	96%	88%
Alaska Details →	SJC 08:00 → PDX 09:44AS 679	46m Portland	PDX 10:30 → BOI 12:49AS 2089 · flown by Horizon	3h 49m	91%	88%
Delta Details →	SJC 07:20 → SEA 09:49DL 4041 · flown by SkyWest	2h 41m Seattle	SEA 12:30 → BOI 15:12DL 3959 · flown by SkyWest	6h 52m	99%	88%
Delta Details →	SJC 14:59 → LAX 16:27DL 3842 · flown by SkyWest	3h 32m Los Angeles	LAX 19:59 → BOI 23:04DL 4148 · flown by SkyWest	7h 05m	99%	87%
Tight connection: often missed
Southwest Details →	SJC 13:58 → BUR 15:05WN 4931	50m Burbank	BUR 15:55 → BOI 18:45WN 776	3h 47m	63%	33%
Alaska Details →	SJC 08:20 → SEA 10:31AS 1426	1h 05m Seattle	SEA 11:36 → BOI 14:07AS 2106 · flown by Horizon	4h 47m	43%	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

LAS · 1h 00m · leaves 06:00 0%

PDX · 46m · leaves 08:00 9%

SAN · 48m · leaves 06:30 14%

Afternoon and evening

SEA · 1h 13m · leaves 14:16 17%

PDX · 1h 01m · leaves 18:37 24%

BUR · 50m · leaves 13:58 37%

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 4843 SJC 06:30 → BUR Alaska AS 3209 BUR 11:00 → BOI Connection details →	3h 20m	6h 39m	100%	98%
Southwest WN 3693 SJC 06:30 → PDX Alaska AS 2089 PDX 10:30 → BOI Connection details →	2h 12m	5h 19m	100%	96%
Southwest WN 4982 SJC 14:10 → SEA Delta DL 3692 SEA 19:50 → BOI Connection details →	3h 30m	7h 18m	100%	86%

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