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 75-minute layover misses 2% of the time at 9 am and 18% of the time at 8 pm.

Nonstops (seasonal or thin)


Southwest	SAN	STL	3h 35m	76%	0.2%	473	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	SAN 22:40 → MDW 04:40WN 257	3h 10m Chicago	MDW 07:50 → STL 09:10 +1WN 2900	8h 30m	100%	95%
American Details →	SAN 22:45 → ORD 05:11AA 1543	1h 54m Chicago	ORD 07:05 → STL 08:31 +1AA 4104 · flown by Envoy	7h 47m	97%	92%
Southwest Details →	SAN 22:40 → BNA 04:45WN 3480	1h 30m Nashville	BNA 06:15 → STL 07:35 +1WN 679	6h 55m	100%	92%
Southwest Details →	SAN 21:55 → MCO 05:55WN 4874	2h 55m Orlando	MCO 08:50 → STL 10:20 +1WN 4501	10h 25m	100%	91%
American Details →	SAN 21:25 → CLT 05:12AA 1860	2h 24m Charlotte	CLT 07:36 → STL 08:32 +1AA 2733	9h 07m	99%	91%
Southwest Details →	SAN 06:35 → LAS 08:15WN 2970	2h 55m Las Vegas	LAS 11:10 → STL 16:25WN 2369	7h 50m	100%	90%
American Details →	SAN 21:55 → PHL 06:13AA 1333	2h 47m Philadelphia	PHL 09:00 → STL 10:36 +1AA 2720	10h 40m	99%	88%
American Details →	SAN 22:25 → MIA 06:36AA 1480	1h 47m Miami	MIA 08:23 → STL 10:24 +1AA 3954 · flown by Envoy	9h 59m	94%	88%
Tight connection: often missed
Delta Details →	SAN 17:01 → SLC 20:00DL 1210	50m Salt Lake City	SLC 20:50 → STL 00:43 +1DL 2666	5h 42m	74%	59%
Delta Details →	SAN 11:37 → DTW 19:09DL 492	51m Detroit	DTW 20:00 → STL 20:39DL 1541	7h 02m	69%	52%
Southwest Details →	SAN 21:40 → BWI 05:35WN 3486	50m Baltimore	BWI 06:25 → STL 07:45 +1WN 1109	8h 05m	42%	38%

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

DAL · 1h 20m · leaves 06:35 2%

PDX · 1h 20m · leaves 06:50 2%

DEN · 1h 00m · leaves 08:32 30%

Afternoon and evening

DTW · 51m · leaves 11:37 31%

PHX · 1h 03m · leaves 16:23 40%

DEN · 55m · leaves 14:55 73%

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 1457 SAN 22:25 → ORD American AA 4104 ORD 07:05 → STL Connection details →	2h 29m	8h 07m	98%	93%
Alaska AS 1618 SAN 07:00 → DEN United UA 1639 DEN 13:25 → STL Connection details →	2h 52m	7h 33m	100%	87%
Delta DL 2530 SAN 07:00 → SEA Alaska AS 647 SEA 13:06 → STL Connection details →	3h 01m	9h 57m	98%	86%

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