UA 568 then AA 2611 at DFW
Denver → Dallas-Fort Worth → Queretaro
Timetable, Dallas-Fort Worth time
12:44UA 568 from Denver at the gate
08:50AA 2611 to Queretaro leaves the gate
20 h 06 apart on the timetable, overnight
AA 2611 leaves 20 h 06 after UA 568 arrives on the timetable: more than half a day, so not a connection we count.