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	BOI	LAX	2h 25m	95%	0.2%	621	Flying now
United	BOI	LAX	2h 33m	92%	0.0%	367	Flying now
Alaska	BOI	LAX	2h 19m	89%	0.4%	717	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 (Los Angeles is 1 h behind Boise). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	BOI 18:42 → SLC 19:57DL 2920	2h 48m Salt Lake City	SLC 22:45 → LAX 23:46DL 2014	6h 04m	98%	93%
United Details →	BOI 05:00 → DEN 07:05UA 5924 · flown by SkyWest	2h 57m Denver	DEN 10:02 → LAX 11:34UA 405	7h 34m	99%	90%
Alaska Details →	BOI 10:00 → SEA 10:34AS 2166 · flown by Horizon	2h 04m Seattle	SEA 12:38 → LAX 15:25AS 502	6h 25m	100%	88%
Delta Details →	BOI 06:00 → SLC 07:11DL 2173	2h 29m Salt Lake City	SLC 09:40 → LAX 10:42DL 1095	5h 42m	97%	88%
Alaska Details →	BOI 13:29 → PDX 13:47AS 2209 · flown by Horizon	3h 50m Portland	PDX 17:37 → LAX 20:09AS 278	7h 40m	99%	87%
Delta Details →	BOI 08:25 → SLC 09:44DL 3607 · flown by SkyWest	1h 46m Salt Lake City	SLC 11:30 → LAX 12:30DL 829	5h 05m	98%	86%
Southwest Details →	BOI 05:18 → PHX 06:22WN 4470	1h 33m Phoenix	PHX 07:55 → LAX 09:20WN 2427	5h 02m	100%	85%
United Details →	BOI 06:30 → DEN 08:29UA 1782	3h 16m Denver	DEN 11:45 → LAX 13:17UA 1013	7h 47m	98%	85%
Tight connection: often missed
Alaska Details →	BOI 16:27 → SEA 17:06AS 740	1h 04m Seattle	SEA 18:10 → LAX 21:00AS 524	5h 33m	65%	53%
American Details →	BOI 12:15 → DFW 16:34AA 1529	56m Dallas-Fort Worth	DFW 17:30 → LAX 18:44AA 1972	7h 29m	71%	36%
United Details →	BOI 19:05 → SFO 19:58UA 649	57m San Francisco	SFO 20:55 → LAX 22:37UA 2850	4h 32m	24%	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

PHX · 1h 06m · leaves 08:11 6%

PDX · 1h 11m · leaves 09:13 6%

SFO · 1h 20m · leaves 06:30 7%

Afternoon and evening

SMF · 1h 00m · leaves 19:20 30%

SEA · 1h 04m · leaves 16:27 35%

SFO · 57m · leaves 19:05 76%

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 715 BOI 06:30 → SMF United UA 5220 SMF 10:13 → LAX Connection details →	3h 18m	6h 35m	100%	100%
Alaska AS 3095 BOI 14:55 → PHX United UA 4722 PHX 18:54 → LAX Connection details →	2h 40m	6h 36m	100%	97%
Delta DL 1442 BOI 13:05 → SLC United UA 5456 SLC 16:42 → LAX Connection details →	2h 21m	5h 48m	98%	95%

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