AA 717 then DL 438 at Seattle
Dallas-Fort Worth → Seattle → Boston
Timetable, Seattle time
13:15AA 717 from Dallas-Fort Worth at the gate
11:45DL 438 to Boston leaves the gate
22 h 30 apart on the timetable, overnight
DL 438 leaves 22 h 30 after AA 717 arrives on the timetable: more than half a day, so not a connection we count.