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 7% of the time at 8 am and 1 time in 5 at 5 pm.

Nonstops


Delta	BOI	SLC	1h 18m	92%	1.0%	1,740	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Salt Lake City on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	BOI 05:18 → PHX 06:22WN 4470	1h 23m Phoenix	PHX 07:45 → SLC 10:25WN 3339	5h 07m	100%	96%
Southwest Details →	BOI 06:30 → SMF 06:55WN 715	1h 10m Sacramento	SMF 08:05 → SLC 10:40WN 3827	4h 10m	95%	91%
Delta Details →	BOI 07:00 → LAX 08:28DL 3725 · flown by SkyWest	1h 27m Los Angeles	LAX 09:55 → SLC 12:50DL 1434	5h 50m	99%	90%
Alaska Details →	BOI 05:57 → PDX 06:17AS 1566	1h 35m Portland	PDX 07:52 → SLC 10:45AS 2333 · flown by Horizon	4h 48m	98%	89%
Delta Details →	BOI 06:43 → SEA 07:35DL 3775 · flown by SkyWest	1h 55m Seattle	SEA 09:30 → SLC 12:38DL 1016	5h 55m	99%	89%
Alaska Details →	BOI 06:23 → SEA 07:00AS 423	1h 48m Seattle	SEA 08:48 → SLC 11:55AS 360	5h 32m	100%	88%
United Details →	BOI 06:30 → SFO 07:30UA 4678 · flown by SkyWest	1h 10m San Francisco	SFO 08:40 → SLC 11:49UA 5605 · flown by SkyWest	5h 19m	93%	88%
Delta Details →	BOI 16:00 → LAX 17:25DL 3701 · flown by SkyWest	1h 50m Los Angeles	LAX 19:15 → SLC 22:05DL 2973	6h 05m	92%	85%
Tight connection: often missed
United Details →	BOI 17:46 → DEN 19:45UA 2395	1h 20m Denver	DEN 21:05 → SLC 22:44UA 5646 · flown by SkyWest	4h 58m	66%	53%
United Details →	BOI 14:00 → SFO 14:58UA 4661 · flown by SkyWest	1h 13m San Francisco	SFO 16:11 → SLC 19:11UA 543	5h 11m	56%	29%
American Details →	BOI 15:54 → DFW 20:15AA 1531	55m Dallas-Fort Worth	DFW 21:10 → SLC 22:59AA 2993	7h 05m	59%	23%

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

DEN · 55m · leaves 07:20 2%

SMF · 1h 10m · leaves 06:30 5%

LAS · 50m · leaves 06:00 6%

Afternoon and evening

DEN · 1h 20m · leaves 17:46 34%

DFW · 55m · leaves 15:54 41%

SFO · 56m · 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 714 BOI 12:20 → SJC Delta DL 1260 SJC 17:01 → SLC Connection details →	3h 56m	7h 37m	100%	94%
Alaska AS 3198 BOI 07:40 → GEG Delta DL 4444 GEG 09:50 → SLC Connection details →	1h 59m	5h 06m	96%	94%
Southwest WN 4470 BOI 05:18 → PHX Delta DL 1447 PHX 09:45 → SLC Connection details →	3h 23m	7h 05m	100%	93%

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