British Airways, Qantas Airways, EVA, and Thai Airways fly from LHR to BKK in just over 11 hours, and the return trip takes about 12 hours 45 minutes.
About 9.25 hours.
15
3 hours 15 minutes
it will take about 9 hours
About 5 hours depending on which part of London.
If you go on a non-stop flight about 14-14.5 Hours although if you are stopping on the way about 16 hours from Manchester -> Bangkok ( Thailand )
Around 4 Hours
About 12 hours
About 3 hours
7 Hours
About four hours.
About five hours by road.