It depends on where in Britain and where in Singapore, but according to the flight time calculator it will take about 13 hours and 25 minutes, if you fly from and to somewhere in the middle of the countries.
To Fly from singapore to kathmandu it would take about 5-6 hours.
it depends.
14hours
If you fly direct it would take about 11 hours.
Fm Singapore to Penang - a mere hour.
10000 years
99 hours
with in 3hrs
8h
It would take 4 hours.
It would take 18 hours.
about 12 to 13 hrs