AA 3715 then AA 2951 at DFW
Springfield → Dallas-Fort Worth → Las Vegas
Timetable, Dallas-Fort Worth time
13:07AA 3715 from Springfield at the gate
12:15AA 2951 to Las Vegas leaves the gate
23 h 08 apart on the timetable, overnight
AA 2951 leaves 23 h 08 after AA 3715 arrives on the timetable: more than half a day, so not a connection we count.