AA 4454 then VS 46 at JFK
Lexington → New York → London Heathrow
Timetable, New York time
15:10AA 4454 from Lexington at the gate
19:01VS 46 to London Heathrow leaves the gate
3 h 51 apart on the timetable
The last days
AA 4454 and VS 46 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.