PD 671 then UA 785 at San Francisco
Toronto → San Francisco → Washington
Timetable, San Francisco time
12:44PD 671 from Toronto at the gatealso TS 7671, AA 9133
06:15UA 785 to Washington leaves the gatealso AZ 4408, NZ 9160
17 h 31 apart on the timetable, overnight
UA 785 leaves 17 h 31 after PD 671 arrives on the timetable: more than half a day, so not a connection we count.