Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Chicago → San Francisco via Boston: arrives on time 79%
-
06:05 ORD → 09:29 BOSUA 1186 · United · 2h 24m · 92% on time, 0.0% cancelled
-
2h 06m layover in Boston (BOS) · 45 min minimum on one ticket
-
11:35 BOS → 15:02 SFOUA 1074 · United · 6h 27m · 80% on time, 0.4% cancelled
Total trip 10h 57m, scheduled departure to arrival (San Francisco is 2 h behind Chicago). Times are local. Both flew on 39 of the last 56 days.
Makes the connection98%The first flight arrived more than 81 minutes late on 2% of the days it flew: too late for the 45-minute minimum connection on a 2h 06m layover.
Arrives on time79%First flight not cancelled (0.0% are) × connection made (98%) × second flight not cancelled (0.4% are) and within 15 minutes (80%).
Total trip10h 57mORD 06:05 to SFO 15:02, layover included
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.