UA 414 then AA 1355 at DFW
Denver → Dallas-Fort Worth → Oklahoma City
Timetable, Dallas-Fort Worth time
18:42UA 414 from Denver at the gate
13:11AA 1355 to Oklahoma City leaves the gate
18 h 29 apart on the timetable, overnight
AA 1355 leaves 18 h 29 after UA 414 arrives on the timetable: more than half a day, so not a connection we count.