DL 5845 then AA 1311 at Philadelphia
Boston → Philadelphia → Phoenix
Timetable, Philadelphia time
08:20DL 5845 from Boston at the gate
20:35AA 1311 to Phoenix leaves the gate
12 h 15 apart on the timetable
AA 1311 leaves 12 h 15 after DL 5845 arrives on the timetable: more than half a day, so not a connection we count.