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 6% of the time at 8 am and barely half the time at 10 pm.

Nonstops


Southwest	BWI	SAN	5h 40m	76%	1.3%	1,159	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 3 h behind Baltimore). Layovers up to 4 hours. Pick a connection for the details.


United Details →	BWI 08:30 → DEN 10:25UA 2412	3h 05m Denver	DEN 13:30 → SAN 14:55UA 1302	9h 25m	99%	86%
Southwest Details →	BWI 10:45 → MKE 11:50WN 1011	2h 40m Milwaukee	MKE 14:30 → SAN 16:40WN 2956	8h 55m	98%	84%
Delta Details →	BWI 07:00 → ATL 08:56DL 2579	2h 57m Atlanta	ATL 11:53 → SAN 13:21DL 540	9h 21m	99%	83%
United Details →	BWI 06:15 → ORD 07:30UA 709	1h 16m Chicago	ORD 08:46 → SAN 11:21UA 660	8h 06m	97%	81%
United Details →	BWI 08:16 → ORD 09:30UA 2749	3h 30m Chicago	ORD 13:00 → SAN 15:25UA 2683	10h 09m	100%	81%
United Details →	BWI 06:00 → IAH 08:16UA 1898	1h 14m Houston	IAH 09:30 → SAN 10:51UA 2491	7h 51m	97%	80%
Southwest Details →	BWI 06:05 → DEN 07:50WN 4436	2h 42m Denver	DEN 10:32 → SAN 12:00WN 1700	8h 52m	100%	79%
Delta Details →	BWI 10:33 → ATL 12:24DL 1592	3h 12m Atlanta	ATL 15:36 → SAN 17:00DL 843	9h 28m	99%	79%
Tight connection: often missed
Frontier Details →	BWI 14:25 → DFW 16:58F9 3787	58m Dallas-Fort Worth	DFW 17:56 → SAN 19:01F9 1425	7h 36m	67%	42%
American Details →	BWI 19:17 → DFW 21:42AA 1626	1h 13m Dallas-Fort Worth	DFW 22:55 → SAN 23:59AA 2568	7h 42m	73%	37%
American Details →	BWI 15:46 → DFW 18:12AA 1629	50m Dallas-Fort Worth	DFW 19:02 → SAN 20:03AA 1243	7h 17m	37%	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

IAH · 1h 14m · leaves 06:00 3%

ATL · 1h 12m · leaves 07:00 5%

PHX · 1h 15m · leaves 07:00 5%

Afternoon and evening

MSP · 48m · leaves 19:10 46%

SFO · 52m · leaves 18:59 52%

DFW · 50m · leaves 15:46 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 4689 BWI 06:20 → ATL Delta DL 540 ATL 11:53 → SAN Connection details →	3h 38m	10h 01m	100%	85%
Southwest WN 4436 BWI 06:05 → DEN United UA 1940 DEN 11:15 → SAN Connection details →	3h 25m	9h 36m	100%	82%
Southwest WN 275 BWI 09:40 → DEN United UA 1302 DEN 13:30 → SAN Connection details →	2h 05m	8h 15m	90%	78%

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