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 3% of the time at 9 am and 18% of the time at 8 pm.

Nonstops


United	SAN	SFO	1h 46m	70%	0.6%	2,656	Flying now
Alaska	SAN	SFO	1h 44m	62%	2.4%	2,397	Flying now
Southwest	SAN	SFO	1h 40m	56%	1.2%	2,001	Flying now
Frontier	SAN	SFO	1h 55m	43%	7.3%	206	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. Layovers up to 4 hours. Pick a connection for the details.


United Details →	SAN 10:55 → DEN 14:27UA 1715	1h 20m Denver	DEN 15:47 → SFO 17:30UA 2633	6h 35m	100%	73%
United Details →	SAN 06:35 → DEN 10:08UA 2368	1h 13m Denver	DEN 11:21 → SFO 13:04UA 1561	6h 29m	98%	69%
United Details →	SAN 08:45 → DEN 12:17UA 2476	1h 08m Denver	DEN 13:25 → SFO 15:09UA 1812	6h 24m	91%	69%
Alaska Details →	SAN 11:21 → SEA 14:25AS 475	2h 11m Seattle	SEA 16:36 → SFO 18:48AS 1385	7h 27m	98%	67%
Alaska Details →	SAN 11:04 → PDX 13:43AS 576	1h 06m Portland	PDX 14:49 → SFO 16:40AS 236	5h 36m	91%	65%
Delta Details →	SAN 17:01 → SLC 20:00DL 1210	2h 50m Salt Lake City	SLC 22:50 → SFO 23:52DL 1091	6h 55m	99%	65%
Delta Details →	SAN 06:15 → SLC 09:22DL 1117	1h 38m Salt Lake City	SLC 11:00 → SFO 12:08DL 902	5h 53m	98%	64%
Delta Details →	SAN 09:47 → SLC 12:50DL 1177	2h 20m Salt Lake City	SLC 15:10 → SFO 16:12DL 1088	6h 28m	99%	63%
Tight connection: often missed
Southwest Details →	SAN 20:05 → LAS 21:30WN 1169	1h 25m Las Vegas	LAS 22:55 → SFO 00:32 +1WN 2784	4h 28m	64%	24%
Southwest Details →	SAN 13:20 → DEN 16:55WN 3496	1h 15m Denver	DEN 18:10 → SFO 19:55WN 4670	6h 35m	45%	9%
Southwest Details →	SAN 17:20 → DEN 20:40WN 4151	1h 00m Denver	DEN 21:40 → SFO 23:25WN 4303	6h 05m	45%	4%

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 · 1h 13m · leaves 06:35 2%

PDX · 1h 13m · leaves 06:50 3%

SEA · 1h 16m · leaves 07:18 6%

Afternoon and evening

SLC · 59m · leaves 17:01 18%

LAX · 46m · leaves 19:56 22%

DEN · 1h 15m · leaves 13:20 55%

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 2970 SAN 06:35 → LAS United UA 574 LAS 11:30 → SFO Connection details →	3h 15m	6h 37m	100%	69%
Southwest WN 2183 SAN 12:55 → LAS United UA 1603 LAS 18:20 → SFO Connection details →	4h 00m	7h 07m	100%	66%
Southwest WN 3508 SAN 11:55 → LAS United UA 2841 LAS 17:13 → SFO Connection details →	3h 53m	7h 00m	100%	65%

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