CM 2528 then UA 1372 at San Francisco
Ontario → San Francisco → Boston
Timetable, San Francisco time
20:10CM 2528 from Ontario at the gatealso AC 4112
12:45UA 1372 to Boston leaves the gatealso VA 8305, NZ 9010
16 h 35 apart on the timetable, overnight
UA 1372 leaves 16 h 35 after CM 2528 arrives on the timetable: more than half a day, so not a connection we count.