Sun, Oct 4 has passed, so this is the 12-month record.

Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: Southwest’s SAN → SAT flights land within a few points of 7 in 10 on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	SAN	SAT	2h 45m	71%	0.7%	610	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Antonio on time. Total trip = scheduled departure to arrival, layover included (San Antonio is 2 h ahead of San Diego). Layovers up to 4 hours. Pick a connection for the details.


United Details →	SAN 06:35 → DEN 10:08UA 2368	3h 36m Denver	DEN 13:44 → SAT 16:55UA 1022	8h 20m	100%	88%
Delta Details →	SAN 06:15 → LAX 07:34DL 3743 · flown by SkyWest	2h 21m Los Angeles	LAX 09:55 → SAT 14:52DL 2568	6h 37m	99%	87%
Southwest Details →	SAN 06:35 → LAS 08:15WN 2970	2h 05m Las Vegas	LAS 10:20 → SAT 15:00WN 2333	6h 25m	100%	86%
Frontier Details →	SAN 10:00 → DEN 13:37F9 4990	2h 03m Denver	DEN 15:40 → SAT 18:56F9 2356	6h 56m	97%	78%
American Details →	SAN 06:16 → DFW 11:32AA 2535	3h 13m Dallas-Fort Worth	DFW 14:45 → SAT 15:55AA 3777 · flown by Envoy	7h 39m	97%	77%
Delta Details →	SAN 15:00 → LAX 16:04DL 4002 · flown by SkyWest	2h 55m Los Angeles	LAX 18:59 → SAT 23:52DL 2686	6h 52m	93%	76%
United Details →	SAN 06:15 → IAH 11:42UA 2760	2h 49m Houston	IAH 14:31 → SAT 15:39UA 1819	7h 24m	100%	76%
American Details →	SAN 06:20 → PHX 07:54AA 625	1h 52m Phoenix	PHX 09:46 → SAT 14:03AA 450	5h 43m	97%	75%
Tight connection: often missed
United Details →	SAN 15:10 → IAH 20:31UA 618	1h 09m Houston	IAH 21:40 → SAT 22:42UA 2198	5h 32m	73%	50%
American Details →	SAN 12:20 → DFW 17:40AA 1467	50m Dallas-Fort Worth	DFW 18:30 → SAT 19:43AA 499	5h 23m	72%	42%
American Details →	SAN 15:08 → DFW 20:30AA 2459	1h 25m Dallas-Fort Worth	DFW 21:55 → SAT 23:04AA 3097	5h 55m	57%	25%

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 15m · leaves 07:45 18%

CLT · 50m · leaves 22:28 42%

Afternoon and evening

IAH · 1h 09m · leaves 15:10 27%

SFO · 48m · leaves 16:09 37%

DFW · 1h 01m · leaves 16:32 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 1006 SAN 06:20 → LAX American AA 6307 LAX 09:28 → SAT Connection details →	2h 07m	6h 16m	97%	90%
Alaska AS 1618 SAN 07:00 → DEN United UA 1022 DEN 13:44 → SAT Connection details →	3h 11m	7h 55m	100%	90%
Alaska AS 3023 SAN 10:52 → PHX Southwest WN 1230 PHX 16:05 → SAT Connection details →	3h 42m	7h 23m	100%	85%

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