DL 3913 then AA 727 at Seattle
Portland (Oregon) → Seattle → Dallas-Fort Worth
Timetable, Seattle time
20:50DL 3913 from Portland (Oregon) at the gate
17:47AA 727 to Dallas-Fort Worth leaves the gate
20 h 57 apart on the timetable, overnight
AA 727 leaves 20 h 57 after DL 3913 arrives on the timetable: more than half a day, so not a connection we count.