UA 683 then WN 988 at Denver
Tampa → Denver → Buffalo
Timetable, Denver time
14:31UA 683 from Tampa at the gate
11:50WN 988 to Buffalo leaves the gate
21 h 19 apart on the timetable, overnight
WN 988 leaves 21 h 19 after UA 683 arrives on the timetable: more than half a day, so not a connection we count.