TK 9588 then DL 860 at San Francisco
Portland (Oregon) → San Francisco → Boston
Timetable, San Francisco time
15:15TK 9588 from Portland (Oregon) at the gate
15:00DL 860 to Boston leaves the gatealso LA 6165, LA 6578, WS 8083
23 h 45 apart on the timetable, overnight
DL 860 leaves 23 h 45 after TK 9588 arrives on the timetable: more than half a day, so not a connection we count.