AC 741 then UA 3906 at San Francisco
Toronto → San Francisco → Washington
Timetable, San Francisco time
13:10AC 741 from Toronto at the gatealso SQ 1015, NZ 4514, UA 8175
07:00UA 3906 to Washington leaves the gate
17 h 50 apart on the timetable, overnight
UA 3906 leaves 17 h 50 after AC 741 arrives on the timetable: more than half a day, so not a connection we count.