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

Connect in the morning. The same one-hour layover misses 6% of the time at 9 am and 2 times in 5 at 8 pm.

Nonstops


Alaska	SAN	BOI	2h 26m	84%	0.6%	727	Flying now
Southwest	SAN	BOI	2h 15m	73%	0.0%	391	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 Diego). Layovers up to 4 hours. Pick a connection for the details.


American Details →	SAN 06:20 → PHX 07:54AA 625	2h 16m Phoenix	PHX 10:10 → BOI 13:27AA 4948 · flown by SkyWest	6h 07m	98%	91%
Delta Details →	SAN 06:15 → SLC 09:22DL 1117	1h 38m Salt Lake City	SLC 11:00 → BOI 12:15DL 1442	5h 02m	98%	90%
Alaska Details →	SAN 06:50 → PDX 09:29AS 399	1h 01m Portland	PDX 10:30 → BOI 12:49AS 2089 · flown by Horizon	4h 59m	94%	89%
Alaska Details →	SAN 07:44 → SMF 09:36AS 2100 · flown by Horizon	3h 34m Sacramento	SMF 13:10 → BOI 15:35AS 2157 · flown by Horizon	6h 51m	100%	89%
Delta Details →	SAN 07:00 → SEA 10:05DL 2530	2h 25m Seattle	SEA 12:30 → BOI 15:12DL 3959 · flown by SkyWest	7h 12m	98%	86%
Alaska Details →	SAN 13:59 → SEA 16:58AS 465	3h 01m Seattle	SEA 19:59 → BOI 22:24AS 2034 · flown by Horizon	7h 25m	100%	86%
Alaska Details →	SAN 10:09 → SEA 13:13AS 1477	2h 32m Seattle	SEA 15:45 → BOI 18:11AS 2061 · flown by Horizon	7h 02m	97%	85%
Delta Details →	SAN 09:47 → SLC 12:50DL 1177	3h 45m Salt Lake City	SLC 16:35 → BOI 17:51DL 2920	7h 05m	99%	85%
Tight connection: often missed
Delta Details →	SAN 17:01 → SLC 20:00DL 1210	46m Salt Lake City	SLC 20:46 → BOI 22:04DL 4446 · flown by SkyWest	4h 04m	69%	60%
United Details →	SAN 16:07 → DEN 19:39UA 682	46m Denver	DEN 20:25 → BOI 22:37UA 5923 · flown by SkyWest	5h 30m	59%	41%
United Details →	SAN 18:27 → SFO 20:07UA 1302	52m San Francisco	SFO 20:59 → BOI 23:55UA 6027 · flown by SkyWest	4h 28m	51%	32%

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 06:50 6%

SEA · 1h 10m · leaves 07:18 6%

DFW · 1h 01m · leaves 06:16 14%

Afternoon and evening

DEN · 46m · leaves 16:07 41%

SEA · 56m · leaves 17:35 41%

SFO · 52m · leaves 18:27 49%

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 4356 SAN 08:40 → SMF Alaska AS 2157 SMF 13:10 → BOI Connection details →	2h 50m	5h 55m	98%	89%
Southwest WN 3539 SAN 14:30 → SJC Alaska AS 3413 SJC 19:48 → BOI Connection details →	3h 53m	7h 03m	100%	86%
Southwest WN 681 SAN 09:15 → PHX American AA 4934 PHX 13:54 → BOI Connection details →	3h 14m	6h 54m	100%	85%

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