The trains run from Bangkok to Hua Hin.
They make the 118 mile trip in under 4 hrs.
This picture is of the train station
Buses leave frequently from Bangkok's Southern Bus Station, roughly every 45 minutes. The journey takes around 3 hours, and costs about 125 baht ($3).
We took the train from Bangkok's Hualamphong station. With a 2nd class ticket for 198baht, you get a seat in an airconditioned car for the 4hr. trip.
Mr. Roong charges 4000B roundtrip from BKK airport. Excellent service. Waited for us at the airport for 1.5hr, still all smiles and no complaints.
Air conditional bus from Hua Hin to Bangkok from 3:00AM to 21:00AM, at least each hour a car depart to bangkok, total time about 3 hours arrive bangkok southern bus temination.
128B for the price.
You can travel by high speed catamaran from Chumporn (not far from Hua Hin) to Koh Samui/Koh Phangan/Koh Tao.
The train from Bkk to Hua Hin is to me the most enjoyable way to reach that town.
Take the train in Bkk, 2d class fan and I really enjoy the trip.
Was not cheat @ 222 Bath one way
Maybe you won't take a train to Huahin or back to Bangkok. But the Huahin Station itself is worth to take a look:-) nice building