F9 1748 then WN 988 at Denver
Phoenix Sky Harbor → Denver → Buffalo
Timetable, Denver time
11:59F9 1748 from Phoenix Sky Harbor at the gate
11:50WN 988 to Buffalo leaves the gate
23 h 51 apart on the timetable, overnight
WN 988 leaves 23 h 51 after F9 1748 arrives on the timetable: more than half a day, so not a connection we count.