TK 9588 then B6 1034 at San Francisco
Portland (Oregon) → San Francisco → Boston
Timetable, San Francisco time
15:15TK 9588 from Portland (Oregon) at the gate
12:14B6 1034 to Boston leaves the gate
20 h 59 apart on the timetable, overnight
B6 1034 leaves 20 h 59 after TK 9588 arrives on the timetable: more than half a day, so not a connection we count.