UA 3694 then AA 6238 at DFW
Newark → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
16:07UA 3694 from Newark at the gate
08:25AA 6238 to Amarillo leaves the gate
16 h 18 apart on the timetable, overnight
AA 6238 leaves 16 h 18 after UA 3694 arrives on the timetable: more than half a day, so not a connection we count.