DL 4539 then DL 1252 at Salt Lake City
Medford → Salt Lake City → San Diego
Timetable, Salt Lake City time
14:49DL 4539 from Medford at the gate
17:10DL 1252 to San Diego leaves the gate
2 h 21 apart on the timetable
The last days
DL 4539 and DL 1252 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.