mid nite 1-2 PM
The travel time between London to India (Bangalore) is 9hr and 30 mins and travel time between India (Bangalore) to London is 10hrs and 30 mins.
9 Hours
London is bigger
It is 4340 nautical miles. Source: Time and Date.com
About 10 hours fly time.
Bangalore (BLR) to London (LON)Shortest Flight Duration 10 hours 35 mins
about February =)
when fly by European carriers (Eg lufthansa) - it touches the skies of bangalore->nagpur->ahmedabad-> Jaipur->pakistan airspace->Baku->Georgia->Romania-> Paris-> London. I assume this is near correct., it will be different when fly by emirates or any gulf sector carrier. (Qatar, Ethihad, Emirates, Gulf Air)
Depending on the Planes, it may be due to air traffic and humidity in-flight.
About 1 hour
It depends on how fast you fly
Belgium, Germany, Communist States, Hungary, Romania, Turkey, Middle East then to Bangalore.