DL 8936 then JL 7544 at San Francisco
Minneapolis → San Francisco → New York JFK
Timetable, San Francisco time
00:55DL 8936 from Minneapolis at the gate
12:25JL 7544 to New York JFK leaves the gate
11 h 30 apart on the timetable
The last days
DL 8936 and JL 7544 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.