TP 4399 then JL 5429 at San Francisco
Boston → San Francisco → Seattle
Timetable, San Francisco time
20:55TP 4399 from Boston at the gate
12:13JL 5429 to Seattle leaves the gate
15 h 18 apart on the timetable, overnight
JL 5429 leaves 15 h 18 after TP 4399 arrives on the timetable: more than half a day, so not a connection we count.