AA 1991 then WN 381 at Salt Lake City
Chicago O'Hare → Salt Lake City → Las Vegas
Timetable, Salt Lake City time
10:58AA 1991 from Chicago O'Hare at the gate
14:50WN 381 to Las Vegas leaves the gate
3 h 52 apart on the timetable
The last days
AA 1991 and WN 381 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.