CZ 1637 then OZ 6310 at San Francisco
Philadelphia → San Francisco → Seattle
Timetable, San Francisco time
19:28CZ 1637 from Philadelphia at the gatealso AA 3079, QF 4594, BA 5439
18:30OZ 6310 to Seattle leaves the gate
23 h 02 apart on the timetable, overnight
OZ 6310 leaves 23 h 02 after CZ 1637 arrives on the timetable: more than half a day, so not a connection we count.