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 83% on time.

Nonstops


American	BOI	PHX	2h 18m	84%	0.3%	1,037	Flying now
Southwest	BOI	PHX	2h 05m	83%	0.5%	813	Flying now
Alaska	BOI	PHX	2h 15m	81%	0.2%	487	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	BOI 13:05 → SLC 14:21DL 1442	3h 04m Salt Lake City	SLC 17:25 → PHX 18:07DL 1451	6h 02m	100%	89%
Southwest Details →	BOI 06:00 → LAS 06:45WN 701	1h 10m Las Vegas	LAS 07:55 → PHX 09:15WN 209	4h 15m	100%	89%
United Details →	BOI 06:30 → DEN 08:29UA 1782	2h 56m Denver	DEN 11:25 → PHX 12:25UA 1686	6h 55m	98%	85%
Delta Details →	BOI 07:00 → LAX 08:28DL 3725 · flown by SkyWest	1h 33m Los Angeles	LAX 10:01 → PHX 11:34DL 3951 · flown by SkyWest	5h 34m	99%	85%
Delta Details →	BOI 18:42 → SLC 19:57DL 2920	2h 48m Salt Lake City	SLC 22:45 → PHX 23:31DL 1496	5h 49m	98%	85%
Delta Details →	BOI 08:25 → SLC 09:44DL 3607 · flown by SkyWest	1h 46m Salt Lake City	SLC 11:30 → PHX 12:12DL 1431	4h 49m	98%	84%
Southwest Details →	BOI 06:30 → SMF 06:55WN 715	50m Sacramento	SMF 07:45 → PHX 09:35WN 106	4h 05m	90%	84%
Alaska Details →	BOI 09:13 → PDX 09:34AS 2184 · flown by Horizon	56m Portland	PDX 10:30 → PHX 13:20AS 716	5h 07m	94%	81%
Tight connection: often missed
Alaska Details →	BOI 18:13 → SEA 18:53AS 296	1h 02m Seattle	SEA 19:55 → PHX 22:53AS 632	5h 40m	70%	52%
United Details →	BOI 14:00 → SFO 14:58UA 4661 · flown by SkyWest	1h 27m San Francisco	SFO 16:25 → PHX 18:39UA 574	5h 39m	66%	48%
American Details →	BOI 15:54 → DFW 20:15AA 1531	1h 14m Dallas-Fort Worth	DFW 21:29 → PHX 22:06AA 3239	7h 13m	73%	38%

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 10m · leaves 06:00 0%

PDX · 56m · leaves 09:13 6%

SMF · 50m · leaves 06:30 10%

Afternoon and evening

DFW · 1h 14m · leaves 15:54 27%

SEA · 1h 02m · leaves 18:13 30%

DEN · 1h 14m · leaves 17:46 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.


Alaska AS 1566 BOI 05:57 → PDX Southwest WN 3207 PDX 09:15 → PHX Connection details →	2h 58m	6h 53m	100%	97%
Alaska AS 3480 BOI 08:03 → LAX United UA 5450 LAX 13:05 → PHX Connection details →	3h 35m	7h 39m	99%	97%
Southwest WN 701 BOI 06:00 → LAS American AA 2004 LAS 09:56 → PHX Connection details →	3h 11m	6h 08m	100%	90%

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