MU 587 then DL 353 at JFK
Shanghai → New York → Los Angeles
Timetable, New York time
13:25MU 587 from Shanghai at the gate
18:00DL 353 to Los Angeles leaves the gate
4 h 35 apart on the timetable
The last days
MU 587 and DL 353 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.