UA 246 then TP 4392 at San Francisco
Chicago O'Hare → San Francisco → Boston
Timetable, San Francisco time
08:44UA 246 from Chicago O'Hare at the gatealso AC 5029, VA 8094, NZ 9323
22:10TP 4392 to Boston leaves the gate
13 h 26 apart on the timetable
TP 4392 leaves 13 h 26 after UA 246 arrives on the timetable: more than half a day, so not a connection we count.