JL 6740 then CF 208 at Narita
Hanoi → Tokyo → Shanghai
Timetable, Tokyo time
09:54JL 6740 from Hanoi at the gate
14:29CF 208 to Shanghai leaves the gate
4 h 35 apart on the timetable
The last days
JL 6740 and CF 208 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.