WN 4367 then WN 1790 at San Francisco
Chicago Midway → San Francisco → Las Vegas
Timetable, San Francisco time
12:30WN 4367 from Chicago Midway at the gate
12:50WN 1790 to Las Vegas leaves the gate
20 min apart on the timetable
The last days
WN 4367 and WN 1790 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.