Sun, Oct 4 has passed, so this is the 12-month record.

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 82% on time.

Nonstops (seasonal or thin)


Alaska	BOI	SNA	2h 17m	88%	0.5%	365	Flying now
Allegiant	BOI	SNA	2h 15m	70%	0.7%	153	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	BOI 06:30 → SMF 06:55WN 715	2h 05m Sacramento	SMF 09:00 → SNA 10:30WN 3329	5h 00m	100%	96%
Alaska Details →	BOI 16:23 → PDX 16:45AS 229	3h 14m Portland	PDX 19:59 → SNA 22:30AS 518	7h 07m	98%	94%
Alaska Details →	BOI 10:00 → SEA 10:34AS 2166 · flown by Horizon	3h 15m Seattle	SEA 13:49 → SNA 16:41AS 773	7h 41m	100%	86%
Alaska Details →	BOI 13:29 → PDX 13:47AS 2209 · flown by Horizon	1h 01m Portland	PDX 14:48 → SNA 17:19AS 264	4h 50m	94%	86%
United Details →	BOI 06:30 → DEN 08:29UA 1782	2h 51m Denver	DEN 11:20 → SNA 12:51UA 1320	7h 21m	98%	86%
Alaska Details →	BOI 06:23 → SEA 07:00AS 423	1h 18m Seattle	SEA 08:18 → SNA 11:15AS 759	5h 52m	100%	86%
Southwest Details →	BOI 15:25 → OAK 16:05WN 4539	2h 30m Oakland	OAK 18:35 → SNA 20:05WN 3089	5h 40m	96%	85%
Southwest Details →	BOI 05:18 → PHX 06:22WN 4470	3h 33m Phoenix	PHX 09:55 → SNA 11:15WN 3001	6h 57m	100%	85%
Tight connection: often missed
Southwest Details →	BOI 19:20 → SMF 19:45WN 717	1h 00m Sacramento	SMF 20:45 → SNA 22:15WN 3837	3h 57m	70%	65%
United Details →	BOI 14:00 → SFO 14:58UA 4661 · flown by SkyWest	1h 32m San Francisco	SFO 16:30 → SNA 18:22UA 5650 · flown by SkyWest	5h 22m	69%	48%
United Details →	BOI 17:46 → DEN 19:45UA 2395	47m Denver	DEN 20:32 → SNA 22:01UA 725	5h 15m	32%	25%

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

SEA · 1h 18m · leaves 06:23 0%

DEN · 1h 18m · leaves 07:20 2%

SLC · 1h 11m · leaves 08:25 2%

Afternoon and evening

SMF · 1h 00m · leaves 19:20 30%

DFW · 1h 01m · leaves 15:54 32%

DEN · 47m · leaves 17:46 68%

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 701 BOI 06:00 → LAS Delta DL 4078 LAS 08:45 → SNA Connection details →	2h 00m	5h 04m	100%	86%
Southwest WN 698 BOI 07:20 → DEN United UA 1320 DEN 11:20 → SNA Connection details →	2h 10m	6h 31m	98%	86%
Alaska AS 740 BOI 16:27 → SEA Delta DL 3932 SEA 19:35 → SNA Connection details →	2h 29m	7h 03m	92%	83%

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