DL 9967 then AA 2604 at Seattle
Las Vegas → Seattle → Dallas-Fort Worth
Timetable, Seattle time
11:53DL 9967 from Las Vegas at the gate
00:25AA 2604 to Dallas-Fort Worth leaves the gate
12 h 32 apart on the timetable, overnight
AA 2604 leaves 12 h 32 after DL 9967 arrives on the timetable: more than half a day, so not a connection we count.