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 8% of the time at 9 am and 23% of the time at 8 pm.

Nonstops (seasonal or thin)


Southwest	HOU	SAN	3h 25m	77%	0.7%	962	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 Houston). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	HOU 05:30 → DEN 06:55WN 1970	1h 20m Denver	DEN 08:15 → SAN 09:40WN 1699	6h 10m	100%	86%
Delta Details →	HOU 06:00 → ATL 09:05DL 2557	2h 48m Atlanta	ATL 11:53 → SAN 13:21DL 540	9h 21m	99%	83%
Delta Details →	HOU 10:16 → ATL 13:20DL 1509	2h 16m Atlanta	ATL 15:36 → SAN 17:00DL 843	8h 45m	98%	77%
American Details →	HOU 06:03 → DFW 07:30AA 3395 · flown by Envoy	1h 35m Dallas-Fort Worth	DFW 09:05 → SAN 10:05AA 2476	6h 02m	95%	74%
Southwest Details →	HOU 06:20 → PHX 06:55WN 2062	2h 20m Phoenix	PHX 09:15 → SAN 10:35WN 1677	6h 13m	98%	68%
Southwest Details →	HOU 07:35 → SMF 09:25WN 2082	1h 20m Sacramento	SMF 10:45 → SAN 12:20WN 1222	6h 45m	96%	59%
Southwest Details →	HOU 06:25 → MDW 08:50WN 2039	1h 18m Chicago	MDW 10:08 → SAN 12:15WN 4648	7h 51m	100%	58%
Southwest Details →	HOU 07:50 → LAS 09:00WN 1998	1h 00m Las Vegas	LAS 10:00 → SAN 11:15WN 347	5h 25m	98%	56%
Tight connection: often missed
Southwest Details →	HOU 08:15 → DEN 09:45WN 1971	47m Denver	DEN 10:32 → SAN 12:00WN 1700	5h 42m	70%	56%
American Details →	HOU 16:14 → DFW 17:38AA 5002 · flown by SkyWest	1h 24m Dallas-Fort Worth	DFW 19:02 → SAN 20:03AA 1243	5h 49m	67%	36%
American Details →	HOU 18:49 → DFW 20:15AA 6385 · flown by SkyWest	1h 19m Dallas-Fort Worth	DFW 21:34 → SAN 22:37AA 1011	5h 48m	69%	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

DEN · 1h 20m · leaves 05:30 0%

LAS · 1h 00m · leaves 07:50 2%

PHX · 1h 00m · leaves 06:20 7%

Afternoon and evening

ATL · 1h 00m · leaves 17:12 23%

DFW · 1h 19m · leaves 18:49 31%

TPA · 1h 05m · leaves 14:40 63%

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 1971 HOU 08:15 → DEN United UA 1302 DEN 13:30 → SAN Connection details →	3h 45m	8h 40m	100%	87%
Southwest WN 1947 HOU 09:45 → ATL Delta DL 843 ATL 15:36 → SAN Connection details →	2h 48m	9h 16m	98%	80%
Southwest WN 1998 HOU 07:50 → LAS Delta DL 3741 LAS 12:56 → SAN Connection details →	3h 56m	8h 27m	98%	77%

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