WN 818 then OO 449 at Denver
Buffalo → Denver → Salt Lake City
Timetable, Denver time
18:35WN 818 from Buffalo at the gate
17:30OO 449 to Salt Lake City leaves the gatealso UA 449
22 h 55 apart on the timetable, overnight
OO 449 leaves 22 h 55 after WN 818 arrives on the timetable: more than half a day, so not a connection we count.