AA 2856 then AA 2874 at DFW
Spokane → Dallas-Fort Worth → Cancún
Timetable, Dallas-Fort Worth time
18:40AA 2856 from Spokane at the gate
10:20AA 2874 to Cancún leaves the gate
15 h 40 apart on the timetable, overnight
AA 2874 leaves 15 h 40 after AA 2856 arrives on the timetable: more than half a day, so not a connection we count.