Flights from Bangkok to the subcontinent

I´d like to fly from SEA (Bangkok) to anywhere in the subcontinent, preferibly Dakha or Katmandu, but Kolkatta would also be fine.This would be around next Febrery...What are my chances of finding anything cheap, like say a one way for less than 200$, searching in Khaosan Rd?

Any advice-sugestion-idea wellcome

CHEERS

Luis

Try Bangladesh Biman air lines ....you can fly into Dhaka and the airlines ofers cheap fares too.Just check it out.