DL 521 then DL 1559 at LAX
Dallas-Fort Worth → Los Angeles → San Francisco
Timetable, Los Angeles time
14:56DL 521 from Dallas-Fort Worth at the gate
20:10DL 1559 to San Francisco leaves the gate
5 h 14 apart on the timetable
The last days
DL 521 and DL 1559 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.