UA 779 then WN 988 at Denver
Austin → Denver → Buffalo
Timetable, Denver time
12:10UA 779 from Austin at the gate
11:50WN 988 to Buffalo leaves the gate
23 h 40 apart on the timetable, overnight
WN 988 leaves 23 h 40 after UA 779 arrives on the timetable: more than half a day, so not a connection we count.