AA 2830 then F9 1820 at Phoenix
Grand Rapids → Phoenix → Denver
Timetable, Phoenix time
09:29AA 2830 from Grand Rapids at the gate
21:59F9 1820 to Denver leaves the gate
12 h 30 apart on the timetable
F9 1820 leaves 12 h 30 after AA 2830 arrives on the timetable: more than half a day, so not a connection we count.