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 → DAL flights land within a few points of 7 in 10 on time whatever the hour.

Nonstops


Southwest	SAN	DAL	3h 00m	70%	1.7%	1,571	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	SAN 22:30 → ATL 05:50DL 819	2h 22m Atlanta	ATL 08:12 → DAL 09:24 +1DL 441	8h 56m	99%	85%
Southwest Details →	SAN 06:35 → LAS 08:15WN 2970	2h 23m Las Vegas	LAS 10:38 → DAL 15:25WN 2218	6h 51m	100%	82%
Southwest Details →	SAN 21:55 → MCO 05:55WN 4874	1h 55m Orlando	MCO 07:50 → DAL 09:25 +1WN 738	9h 30m	100%	78%
Southwest Details →	SAN 06:20 → HOU 11:45WN 2034	3h 15m Houston	HOU 15:00 → DAL 16:10WN 36	7h 50m	100%	76%
Delta Details →	SAN 06:15 → ATL 13:43DL 729	2h 55m Atlanta	ATL 16:38 → DAL 17:55DL 2780	9h 40m	99%	76%
Southwest Details →	SAN 08:00 → PHX 09:20WN 3524	1h 35m Phoenix	PHX 10:55 → DAL 15:20WN 3255	5h 20m	100%	74%
Southwest Details →	SAN 07:15 → OAK 08:50WN 4198	2h 10m Oakland	OAK 11:00 → DAL 16:25WN 3014	7h 10m	97%	71%
Southwest Details →	SAN 12:55 → LAS 14:20WN 2183	3h 00m Las Vegas	LAS 17:20 → DAL 22:10WN 2220	7h 15m	100%	71%
Tight connection: often missed
Southwest Details →	SAN 11:55 → LAS 13:20WN 3508	1h 05m Las Vegas	LAS 14:25 → DAL 19:10WN 4489	5h 15m	56%	31%
Southwest Details →	SAN 06:35 → BNA 12:45WN 3478	50m Nashville	BNA 13:35 → DAL 15:30WN 488	6h 55m	60%	29%
Southwest Details →	SAN 13:20 → DEN 16:55WN 3496	55m Denver	DEN 17:50 → DAL 21:00WN 1521	5h 40m	18%	7%

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

BWI · 1h 15m · leaves 21:40 19%

Afternoon and evening

ATL · 1h 10m · leaves 08:00 9%

DEN · 55m · leaves 13:20 82%

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.


Delta DL 819 SAN 22:30 → ATL Southwest WN 4394 ATL 08:55 → DAL Connection details →	3h 05m	9h 35m	99%	77%
American AA 625 SAN 06:20 → PHX Southwest WN 3255 PHX 10:55 → DAL Connection details →	3h 01m	7h 00m	98%	72%
Alaska AS 2255 SAN 12:30 → LAS Southwest WN 2220 LAS 17:20 → DAL Connection details →	3h 22m	7h 40m	95%	64%

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