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 3% of the time at 8 am and 1 time in 3 at 7 pm.

Nonstops


United	BWI	SFO	5h 50m	79%	0.9%	689	Flying now
Southwest	BWI	SFO	6h 05m	56%	0.8%	365	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Francisco on time. Total trip = scheduled departure to arrival, layover included (San Francisco 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 00m Denver	DEN 13:25 → SFO 15:09UA 1812	9h 39m	99%	75%
United Details →	BWI 10:32 → ORD 11:48UA 704	2h 42m Chicago	ORD 14:30 → SFO 17:19UA 1577	9h 47m	100%	73%
Delta Details →	BWI 05:40 → ATL 07:31DL 2950	54m Atlanta	ATL 08:25 → SFO 10:20DL 693	7h 45m	91%	71%
Delta Details →	BWI 07:00 → ATL 08:56DL 2579	4h 00m Atlanta	ATL 12:56 → SFO 14:50DL 750	10h 54m	99%	71%
Delta Details →	BWI 11:35 → MSP 13:16DL 2357	1h 51m Minneapolis	MSP 15:07 → SFO 17:14DL 756	8h 38m	96%	70%
United Details →	BWI 06:00 → IAH 08:16UA 1898	1h 19m Houston	IAH 09:35 → SFO 11:35UA 2358	8h 35m	97%	69%
United Details →	BWI 17:32 → ORD 18:55UA 590	2h 40m Chicago	ORD 21:35 → SFO 00:32 +1UA 2106	10h 00m	91%	69%
Delta Details →	BWI 06:19 → MSP 07:56DL 2872	3h 04m Minneapolis	MSP 11:00 → SFO 13:10DL 2074	9h 51m	99%	67%
Tight connection: often missed
American Details →	BWI 15:46 → DFW 18:12AA 1629	1h 16m Dallas-Fort Worth	DFW 19:28 → SFO 21:10AA 1430	8h 24m	66%	31%
United Details →	BWI 17:32 → ORD 18:55UA 590	1h 09m Chicago	ORD 20:04 → SFO 22:57UA 1495	8h 25m	67%	30%
United Details →	BWI 15:03 → IAH 17:19UA 2095	46m Houston	IAH 18:05 → SFO 20:10UA 1341	8h 07m	40%	24%

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 19m · leaves 06:00 3%

ATL · 54m · leaves 05:40 9%

DTW · 50m · leaves 06:08 9%

Afternoon and evening

BOS · 55m · leaves 18:21 35%

LAS · 1h 00m · leaves 18:40 48%

IAH · 46m · leaves 15:03 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.


Southwest WN 883 BWI 06:38 → BOS United UA 1074 BOS 11:35 → SFO Connection details →	3h 27m	11h 24m	100%	80%
Delta DL 5813 BWI 06:17 → BOS JetBlue B6 1833 BOS 09:50 → SFO Connection details →	1h 50m	10h 08m	97%	78%
Southwest WN 887 BWI 10:40 → BOS JetBlue B6 233 BOS 15:50 → SFO Connection details →	3h 40m	11h 44m	100%	72%

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