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 12% of the time at 6 am and 1 time in 4 at 10 pm.

Nonstops


United	SFO	BWI	5h 19m	90%	0.4%	688	Flying now
Southwest	SFO	BWI	5h 10m	65%	0.8%	365	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 Francisco). Layovers up to 4 hours. Pick a connection for the details.


United Details →	SFO 19:45 → LAX 21:29UA 298	1h 36m Los Angeles	LAX 23:05 → BWI 07:14 +1UA 1605	8h 29m	100%	91%
Alaska Details →	SFO 15:50 → SEA 18:00AS 1340	3h 36m Seattle	SEA 21:36 → BWI 05:41 +1AS 781	10h 51m	100%	90%
Southwest Details →	SFO 23:40 → MDW 05:55WN 3649	3h 00m Chicago	MDW 08:55 → BWI 11:45 +1WN 1355	9h 05m	100%	89%
United Details →	SFO 06:00 → LAX 07:39UA 2127	1h 54m Los Angeles	LAX 09:33 → BWI 17:43UA 1093	8h 43m	98%	88%
Delta Details →	SFO 23:59 → ATL 07:42DL 690	3h 28m Atlanta	ATL 11:10 → BWI 13:03 +1DL 2711	10h 04m	99%	87%
United Details →	SFO 05:00 → DEN 08:35UA 1479	1h 11m Denver	DEN 09:46 → BWI 15:17UA 1362	7h 17m	98%	87%
Delta Details →	SFO 22:55 → DTW 06:30DL 335	3h 40m Detroit	DTW 10:10 → BWI 11:47 +1DL 1546	9h 52m	100%	85%
Delta Details →	SFO 22:59 → ATL 06:40DL 495	2h 15m Atlanta	ATL 08:55 → BWI 10:47 +1DL 801	8h 48m	96%	85%
Tight connection: often missed
Delta Details →	SFO 14:00 → ATL 21:49DL 531	56m Atlanta	ATL 22:45 → BWI 00:40 +1DL 2590	7h 40m	74%	56%
American Details →	SFO 13:20 → CLT 21:44AA 2562	1h 01m Charlotte	CLT 22:45 → BWI 00:14 +1AA 1318	7h 54m	75%	54%
American Details →	SFO 11:24 → MIA 20:05AA 2565	1h 12m Miami	MIA 21:17 → BWI 23:54AA 3216	9h 30m	69%	39%

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 11m · leaves 05:00 2%

MSP · 1h 01m · leaves 00:35 12%

IAH · 1h 06m · leaves 00:45 13%

Afternoon and evening

MIA · 1h 12m · leaves 11:24 31%

PHX · 1h 10m · leaves 13:08 64%

DEN · 55m · leaves 14:35 93%

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 234 SFO 21:30 → DTW Delta DL 2341 DTW 07:10 → BWI Connection details →	1h 50m	8h 14m	100%	93%
Southwest WN 2222 SFO 06:05 → LAX United UA 1093 LAX 09:33 → BWI Connection details →	1h 58m	8h 38m	100%	90%
United UA 574 SFO 16:25 → PHX Southwest WN 1170 PHX 22:25 → BWI Connection details →	3h 46m	10h 15m	98%	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