AA 2856 then UA 539 at DFW
Spokane → Dallas-Fort Worth → Houston
Timetable, Dallas-Fort Worth time
18:40AA 2856 from Spokane at the gate
12:10UA 539 to Houston leaves the gate
17 h 30 apart on the timetable, overnight
UA 539 leaves 17 h 30 after AA 2856 arrives on the timetable: more than half a day, so not a connection we count.