VS 48 then BA 748 at Heathrow
New York JFK → London → Geneva
Timetable, London time
08:35VS 48 from New York JFK at the gate
17:50BA 748 to Geneva leaves the gate
9 h 15 apart on the timetable
The last days
VS 48 and BA 748 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.