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 75-minute layover misses 5% of the time at 8 am and 17% of the time at 5 pm.

Nonstops


United	BOI	SFO	2h 00m	71%	0.4%	1,466	Flying now
Alaska	BOI	SFO	1h 57m	64%	1.1%	361	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Alaska Details →	BOI 14:47 → GEG 14:55AS 2259 · flown by Horizon	1h 26m Spokane	GEG 16:21 → SFO 18:45AS 3070 · flown by SkyWest	4h 58m	85%	74%
United Details →	BOI 10:20 → DEN 12:27UA 6041 · flown by SkyWest	3h 20m Denver	DEN 15:47 → SFO 17:30UA 2633	8h 10m	99%	72%
Alaska Details →	BOI 13:06 → SEA 13:40AS 2235 · flown by Horizon	2h 56m Seattle	SEA 16:36 → SFO 18:48AS 1385	6h 42m	100%	70%
United Details →	BOI 06:30 → DEN 08:29UA 1782	2h 52m Denver	DEN 11:21 → SFO 13:04UA 1561	7h 34m	98%	70%
Alaska Details →	BOI 08:15 → SEA 08:50AS 2070 · flown by Horizon	2h 52m Seattle	SEA 11:42 → SFO 14:04AS 655	6h 49m	100%	70%
Delta Details →	BOI 18:10 → SEA 18:54DL 4127 · flown by SkyWest	2h 51m Seattle	SEA 21:45 → SFO 00:06 +1DL 2635	6h 56m	98%	69%
Alaska Details →	BOI 13:29 → PDX 13:47AS 2209 · flown by Horizon	1h 02m Portland	PDX 14:49 → SFO 16:40AS 236	4h 11m	94%	69%
Delta Details →	BOI 11:55 → SEA 12:42DL 3678 · flown by SkyWest	1h 48m Seattle	SEA 14:30 → SFO 16:50DL 3707 · flown by SkyWest	5h 55m	97%	68%
Tight connection: often missed
United Details →	BOI 17:46 → DEN 19:45UA 2395	1h 25m Denver	DEN 21:10 → SFO 22:56UA 2123	6h 10m	70%	42%
Alaska Details →	BOI 10:00 → SEA 10:34AS 2166 · flown by Horizon	1h 08m Seattle	SEA 11:42 → SFO 14:04AS 655	5h 04m	61%	42%
Alaska Details →	BOI 16:15 → LAS 17:12AS 2087 · flown by Horizon	51m Las Vegas	LAS 18:03 → SFO 19:41AS 634	4h 26m	74%	41%

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 13m · leaves 06:00 0%

SLC · 1h 16m · leaves 08:25 2%

DEN · 1h 14m · leaves 06:30 5%

Afternoon and evening

PDX · 51m · leaves 16:23 19%

LAS · 51m · leaves 16:15 26%

SEA · 49m · leaves 18:13 45%

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 2180 BOI 18:51 → LAX American AA 6510 LAX 22:32 → SFO Connection details →	2h 22m	6h 08m	100%	81%
Southwest WN 699 BOI 10:25 → DEN United UA 2633 DEN 15:47 → SFO Connection details →	3h 27m	8h 05m	98%	72%
Southwest WN 698 BOI 07:20 → DEN United UA 1561 DEN 11:21 → SFO Connection details →	2h 11m	6h 44m	98%	70%

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