TK 9588 then LY 4668 at San Francisco
Portland (Oregon) → San Francisco → Boston
Timetable, San Francisco time
15:15TK 9588 from Portland (Oregon) at the gate
12:40LY 4668 to Boston leaves the gatealso LA 6205, MU 8695
21 h 25 apart on the timetable, overnight
LY 4668 leaves 21 h 25 after TK 9588 arrives on the timetable: more than half a day, so not a connection we count.