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 1 time in 10 at 6 am and 1 time in 3 at 7 pm.

Nonstops (seasonal or thin)


Southwest	SAT	SAN	3h 00m	79%	0.3%	610	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	SAT 05:45 → DEN 07:00WN 3565	1h 15m Denver	DEN 08:15 → SAN 09:40WN 1699	5h 55m	100%	86%
United Details →	SAT 05:30 → IAH 06:37UA 469	2h 53m Houston	IAH 09:30 → SAN 10:51UA 2491	7h 21m	99%	83%
United Details →	SAT 08:53 → DEN 10:11UA 2853	3h 19m Denver	DEN 13:30 → SAN 14:55UA 1302	8h 02m	97%	83%
Delta Details →	SAT 06:40 → ATL 10:06DL 1066	1h 47m Atlanta	ATL 11:53 → SAN 13:21DL 540	8h 41m	98%	82%
Delta Details →	SAT 06:30 → SLC 08:24DL 2592	2h 51m Salt Lake City	SLC 11:15 → SAN 12:17DL 1296	7h 47m	99%	81%
Delta Details →	SAT 12:36 → SLC 14:30DL 930	2h 40m Salt Lake City	SLC 17:10 → SAN 18:06DL 1252	7h 30m	98%	81%
Delta Details →	SAT 18:03 → SLC 20:00DL 2685	2h 55m Salt Lake City	SLC 22:55 → SAN 23:50DL 1202	7h 50m	98%	81%
United Details →	SAT 07:43 → IAH 08:50UA 410	3h 10m Houston	IAH 12:00 → SAN 13:21UA 2399	7h 38m	97%	80%
Tight connection: often missed
Southwest Details →	SAT 18:30 → DEN 20:00WN 3568	1h 30m Denver	DEN 21:30 → SAN 23:00WN 1704	6h 25m	72%	36%
American Details →	SAT 11:04 → DFW 12:21AA 413	59m Dallas-Fort Worth	DFW 13:20 → SAN 14:17AA 2459	5h 13m	69%	32%
American Details →	SAT 15:44 → PHX 16:10AA 2495	56m Phoenix	PHX 17:06 → SAN 18:18AA 2466	4h 34m	48%	21%

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

ATL · 1h 15m · leaves 05:25 4%

SFO · 1h 10m · leaves 07:00 7%

PHX · 1h 14m · leaves 08:41 8%

Afternoon and evening

DFW · 1h 11m · leaves 20:23 39%

BNA · 1h 10m · leaves 16:55 51%

PHX · 56m · leaves 15:44 52%

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 1577 SAT 09:05 → DEN United UA 1302 DEN 13:30 → SAN Connection details →	3h 15m	7h 50m	100%	87%
Southwest WN 1090 SAT 12:25 → DEN United UA 1281 DEN 15:55 → SAN Connection details →	2h 15m	6h 55m	94%	80%
American AA 6307 SAT 15:09 → LAX United UA 5415 LAX 18:50 → SAN Connection details →	2h 23m	6h 42m	94%	79%

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