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 DAL → SAT flights land within a few points of 78% on time whatever the hour.

Nonstops


Southwest	DAL	SAT	1h 10m	78%	1.1%	2,742	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. Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	DAL 06:00 → PHX 06:28WN 1379	1h 27m Phoenix	PHX 07:55 → SAT 12:05WN 4081	6h 05m	100%	93%
Southwest Details →	DAL 06:00 → DEN 07:00WN 1296	2h 20m Denver	DEN 09:20 → SAT 12:25WN 3149	6h 25m	100%	81%
Southwest Details →	DAL 06:00 → HOU 07:10WN 1628	2h 15m Houston	HOU 09:25 → SAT 10:25WN 1432	4h 25m	99%	79%
Southwest Details →	DAL 08:50 → PHX 09:20WN 4410	1h 40m Phoenix	PHX 11:00 → SAT 15:10WN 2986	6h 20m	97%	69%
Delta Details →	DAL 18:40 → ATL 22:00DL 2780	1h 00m Atlanta	ATL 23:00 → SAT 00:33 +1DL 1508	5h 53m	78%	60%
Southwest Details →	DAL 12:00 → MCI 13:30WN 4327	1h 25m Kansas City	MCI 14:55 → SAT 16:55WN 2583	4h 55m	82%	60%
Southwest Details →	DAL 17:25 → STL 19:10WN 2921	3h 05m St Louis	STL 22:15 → SAT 00:25 +1WN 3979	6h 55m	91%	59%
Delta Details →	DAL 15:59 → ATL 19:14DL 512	1h 36m Atlanta	ATL 20:50 → SAT 22:19DL 1222	6h 21m	85%	58%
Tight connection: often missed
Southwest Details →	DAL 18:50 → PHX 19:15WN 4258	1h 50m Phoenix	PHX 21:05 → SAT 01:15 +1WN 3328	6h 27m	73%	35%
Southwest Details →	DAL 20:30 → HOU 21:40WN 57	55m Houston	HOU 22:35 → SAT 23:30WN 4451	3h 00m	65%	34%
Southwest Details →	DAL 19:10 → LAS 20:00WN 1323	55m Las Vegas	LAS 20:55 → SAT 01:35 +1WN 2335	6h 25m	39%	16%

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 05m · leaves 10:40 31%

Afternoon and evening

ATL · 1h 00m · leaves 18:40 22%

HOU · 55m · leaves 20:30 35%

LAS · 55m · leaves 19:10 61%

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 1296 DAL 06:00 → DEN United UA 2625 DEN 09:35 → SAT Connection details →	2h 35m	6h 43m	100%	92%
Southwest WN 4394 DAL 10:45 → DEN United UA 1022 DEN 13:44 → SAT Connection details →	1h 59m	6h 10m	85%	76%
Southwest WN 1166 DAL 10:25 → PHX American AA 2497 PHX 12:30 → SAT Connection details →	1h 35m	6h 17m	56%	40%

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