AA 3163 then DL 2057 at DFW
Portland (Oregon) → Dallas-Fort Worth → Boston
Timetable, Dallas-Fort Worth time
05:29AA 3163 from Portland (Oregon) at the gate
17:30DL 2057 to Boston leaves the gate
12 h 01 apart on the timetable
DL 2057 leaves 12 h 01 after AA 3163 arrives on the timetable: more than half a day, so not a connection we count.