F9 3871 then WN 4199 at Phoenix
Salt Lake City → Phoenix → San Diego
Timetable, Phoenix time
14:46F9 3871 from Salt Lake City at the gate
15:15WN 4199 to San Diego leaves the gate
29 min apart on the timetable
The last days
F9 3871 and WN 4199 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.