Flight Heathrow Airport departs from London Heathrow Airport at 18:15 and arrives at Napoli Napoli / Capodichino International Airport at 21:55.
The flighttime is about 2h 40m. The distance travelled ("as the bird flies"): 2012 Km. So the average speed is roughly 754 Km.
There is an 1 hour time difference between London and Napoli