UA 2835 then AA 6254 at Phoenix
Houston → Phoenix → Durango
Timetable, Phoenix time
10:01UA 2835 from Houston at the gate
09:54AA 6254 to Durango leaves the gate
23 h 53 apart on the timetable, overnight
AA 6254 leaves 23 h 53 after UA 2835 arrives on the timetable: more than half a day, so not a connection we count.