AA 2896 then UA 2077 at DFW
Chicago O'Hare → Dallas-Fort Worth → Denver
Timetable, Dallas-Fort Worth time
00:43AA 2896 from Chicago O'Hare at the gate
16:55UA 2077 to Denver leaves the gate
16 h 12 apart on the timetable
UA 2077 leaves 16 h 12 after AA 2896 arrives on the timetable: more than half a day, so not a connection we count.