DE 3728 then AF 9664 at JFK
Frankfurt am Main → New York → London Heathrow
Timetable, New York time
15:05DE 3728 from Frankfurt am Main at the gate
19:01AF 9664 to London Heathrow leaves the gate
3 h 56 apart on the timetable
The last days
DE 3728 and AF 9664 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.