Taxi or private car from Bangkok International Airport takes 2 hours and 30 minutes and is reasonably priced. Should be booked in advance. We can assist you with at pick-up service at the airport. There are several bus departures from Bangkok International Airport to Hua Hin. Tickets may be booked in advance on internet and is currently priced slightly over 300 THB. The buses are airconditioned.The Train trip from Bangkok to Hua Hin is an experience, but takes a lot of time. Allow at least 4-5 hours, as the speed within Bangkok is very slow.