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 5% of the time at 9 am and 30% of the time at 9 pm.

Nonstops


Frontier	SLC	SFO	2h 24m	69%	2.6%	195	Flying now
United	SLC	SFO	2h 16m	68%	0.7%	1,487	Flying now
Delta	SLC	SFO	2h 06m	65%	1.0%	1,713	Flying now
Alaska	SLC	SFO	2h 17m	78%	3.8%	79	Not 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 Salt Lake City). Layovers up to 4 hours. Pick a connection for the details.


United Details →	SLC 08:30 → DEN 10:27UA 5642 · flown by SkyWest	2h 58m Denver	DEN 13:25 → SFO 15:09UA 1812	7h 39m	98%	74%
United Details →	SLC 07:00 → DEN 08:42UA 1232	2h 39m Denver	DEN 11:21 → SFO 13:04UA 1561	7h 04m	99%	70%
Alaska Details →	SLC 11:22 → PDX 12:23AS 2333 · flown by Horizon	2h 26m Portland	PDX 14:49 → SFO 16:40AS 236	6h 18m	95%	70%
Alaska Details →	SLC 12:51 → SEA 14:04AS 664	2h 32m Seattle	SEA 16:36 → SFO 18:48AS 1385	6h 57m	98%	69%
Delta Details →	SLC 17:20 → SEA 18:36DL 871	3h 09m Seattle	SEA 21:45 → SFO 00:06 +1DL 2635	7h 46m	98%	69%
Delta Details →	SLC 11:35 → SEA 12:52DL 2995	1h 38m Seattle	SEA 14:30 → SFO 16:50DL 3707 · flown by SkyWest	6h 15m	97%	68%
Delta Details →	SLC 07:49 → LAX 08:50DL 1087	3h 10m Los Angeles	LAX 12:00 → SFO 13:26DL 2725	6h 39m	99%	66%
United Details →	SLC 13:05 → DEN 14:51UA 4720 · flown by SkyWest	3h 03m Denver	DEN 17:54 → SFO 19:40UA 1007	7h 35m	98%	66%
Tight connection: often missed
United Details →	SLC 08:30 → DEN 10:27UA 5642 · flown by SkyWest	54m Denver	DEN 11:21 → SFO 13:04UA 1561	5h 34m	74%	53%
Alaska Details →	SLC 09:10 → SEA 10:35AS 3381 · flown by SkyWest	1h 07m Seattle	SEA 11:42 → SFO 14:04AS 655	5h 54m	66%	46%
American Details →	SLC 18:50 → PHX 19:37AA 4928 · flown by SkyWest	46m Phoenix	PHX 20:23 → SFO 22:23AA 686	4h 33m	44%	20%

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 08m · leaves 06:25 0%

PDX · 1h 16m · leaves 08:20 0%

SAN · 1h 14m · leaves 07:40 4%

Afternoon and evening

DFW · 1h 04m · leaves 16:42 50%

LAS · 50m · leaves 20:30 54%

PHX · 46m · leaves 18:50 56%

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.


Delta DL 4444 SLC 08:15 → GEG United UA 5217 GEG 12:37 → SFO Connection details →	3h 30m	7h 46m	100%	79%
Delta DL 1296 SLC 11:15 → SAN United UA 2117 SAN 16:09 → SFO Connection details →	3h 52m	7h 34m	99%	74%
Southwest WN 3739 SLC 10:40 → DEN United UA 2633 DEN 15:47 → SFO Connection details →	3h 42m	7h 50m	100%	73%

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