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 2% of the time at 8 am and 38% of the time at 8 pm.

Nonstops


Delta	SFO	SLC	1h 56m	78%	1.0%	1,715	Flying now
United	SFO	SLC	1h 59m	77%	0.9%	1,484	Flying now
Frontier	SFO	SLC	2h 09m	71%	2.1%	195	Flying now
Alaska	SFO	SLC	1h 55m	78%	1.3%	79	Not 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 (Salt Lake City is 1 h ahead of San Francisco). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	SFO 14:30 → LAX 15:56DL 2725	3h 19m Los Angeles	LAX 19:15 → SLC 22:05DL 2973	6h 35m	100%	90%
Alaska Details →	SFO 07:20 → PDX 09:02AS 1410	1h 53m Portland	PDX 10:55 → SLC 13:59AS 3112 · flown by SkyWest	5h 39m	97%	89%
Delta Details →	SFO 07:00 → LAX 08:30DL 1598	1h 25m Los Angeles	LAX 09:55 → SLC 12:50DL 1434	4h 50m	97%	88%
United Details →	SFO 08:50 → LAX 10:34UA 1896	2h 21m Los Angeles	LAX 12:55 → SLC 15:48UA 5371 · flown by SkyWest	5h 58m	99%	88%
Delta Details →	SFO 05:55 → SEA 08:11DL 2721	1h 19m Seattle	SEA 09:30 → SLC 12:38DL 1016	5h 43m	98%	86%
Frontier Details →	SFO 06:00 → DEN 09:49F9 1230	3h 29m Denver	DEN 13:18 → SLC 14:55F9 3981	7h 55m	99%	84%
United Details →	SFO 16:25 → LAX 18:05UA 1754	2h 14m Los Angeles	LAX 20:19 → SLC 23:11UA 5744 · flown by SkyWest	5h 46m	95%	83%
Southwest Details →	SFO 05:00 → LAS 06:35WN 4231	1h 00m Las Vegas	LAS 07:35 → SLC 10:00WN 2957	4h 00m	90%	82%
Tight connection: often missed
Alaska Details →	SFO 15:02 → PDX 16:47AS 1302	53m Portland	PDX 17:40 → SLC 20:41AS 3291 · flown by SkyWest	4h 39m	67%	53%
Delta Details →	SFO 14:30 → LAX 15:56DL 2725	1h 09m Los Angeles	LAX 17:05 → SLC 19:59DL 2311	4h 29m	65%	50%
Alaska Details →	SFO 13:21 → SAN 15:05AS 3482 · flown by SkyWest	49m San Diego	SAN 15:54 → SLC 19:02AS 3488 · flown by SkyWest	4h 41m	43%	35%

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 19m · leaves 05:55 2%

MSP · 54m · leaves 06:00 9%

LAS · 1h 00m · leaves 05:00 10%

Afternoon and evening

DFW · 1h 11m · leaves 14:03 38%

LAX · 1h 02m · leaves 16:39 45%

SAN · 49m · leaves 13:21 57%

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.


United UA 4717 SFO 09:15 → PSC Delta DL 3892 PSC 13:50 → SLC Connection details →	2h 23m	6h 23m	100%	93%
United UA 2610 SFO 13:55 → LAX Delta DL 2973 LAX 19:15 → SLC Connection details →	3h 40m	7h 10m	99%	92%
Southwest WN 2222 SFO 06:05 → LAX Delta DL 1434 LAX 09:55 → SLC Connection details →	2h 20m	5h 45m	100%	91%

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