CZ 1637 then BA 2947 at San Francisco
Philadelphia → San Francisco → Seattle
Timetable, San Francisco time
20:33CZ 1637 from Philadelphia at the gatealso AA 3079, BA 5439
18:48BA 2947 to Seattle leaves the gate
22 h 15 apart on the timetable, overnight
BA 2947 leaves 22 h 15 after CZ 1637 arrives on the timetable: more than half a day, so not a connection we count.