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 → BWI flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops


Southwest	SAN	BWI	5h 00m	79%	1.6%	1,160	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Baltimore on time. Total trip = scheduled departure to arrival, layover included (Baltimore is 3 h ahead of San Diego). Layovers up to 4 hours. Pick a connection for the details.


United Details →	SAN 22:25 → ORD 04:36UA 1457	1h 54m Chicago	ORD 06:30 → BWI 09:27 +1UA 1269	8h 02m	98%	91%
Southwest Details →	SAN 21:55 → MCO 05:55WN 4874	2h 45m Orlando	MCO 08:40 → BWI 10:55 +1WN 2611	10h 00m	100%	90%
Southwest Details →	SAN 19:55 → HOU 01:55WN 4675	3h 30m Houston	HOU 05:25 → BWI 09:30 +1WN 3797	10h 35m	96%	90%
Southwest Details →	SAN 20:25 → SAT 01:12WN 3530	3h 58m San Antonio	SAT 05:10 → BWI 09:30 +1WN 3559	10h 05m	96%	89%
United Details →	SAN 06:20 → LAX 07:21UA 1006	2h 12m Los Angeles	LAX 09:33 → BWI 17:43UA 1093	8h 23m	99%	89%
Delta Details →	SAN 22:15 → DTW 05:43DL 764	1h 27m Detroit	DTW 07:10 → BWI 08:44 +1DL 2341	7h 29m	97%	88%
United Details →	SAN 06:20 → SFO 08:04UA 2830	1h 29m San Francisco	SFO 09:33 → BWI 17:57UA 2664	8h 37m	98%	88%
Alaska Details →	SAN 15:16 → SEA 18:14AS 1381	3h 22m Seattle	SEA 21:36 → BWI 05:41 +1AS 781	11h 25m	98%	87%
Tight connection: often missed
Alaska Details →	SAN 17:35 → SEA 20:35AS 417	1h 01m Seattle	SEA 21:36 → BWI 05:41 +1AS 781	9h 06m	69%	63%
Southwest Details →	SAN 19:35 → DEN 22:55WN 4152	55m Denver	DEN 23:50 → BWI 05:15 +1WN 1501	6h 40m	42%	27%
Southwest Details →	SAN 13:20 → DEN 16:55WN 3496	2h 10m Denver	DEN 19:05 → BWI 00:35 +1WN 1500	8h 13m	70%	20%

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 00m · leaves 06:30 12%

MCO · 1h 15m · leaves 21:55 18%

Afternoon and evening

SFO · 1h 12m · leaves 19:41 57%

DEN · 1h 10m · leaves 13:20 59%

MDW · 50m · leaves 12:10 60%

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.


Alaska AS 255 SAN 20:52 → BOS Southwest WN 732 BOS 08:55 → BWI Connection details →	3h 15m	10h 38m	99%	91%
Alaska AS 707 SAN 21:06 → MCO Southwest WN 2611 MCO 08:40 → BWI Connection details →	3h 22m	10h 49m	99%	90%
American AA 1860 SAN 21:25 → CLT Southwest WN 4695 CLT 07:50 → BWI Connection details →	2h 38m	8h 55m	97%	90%

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