Thailand is well known for it's ease of travel. Generally you can leave yourselves in the hands of tour guides who will organise every aspect of your travel needs.

By Air
Bangkok to Koh Samui: Bangkok Airways provides over 10 flights/day. Thai Airways International (02 628-2000) offers daily flight to Suratthani. See boat transfers for getting to the island.
Bangkok to Chumphon: Air Andaman flies four times a week to Chumphon.

www.Bangkokair.com

By Train
Bangkok to Chumphon: For travelers not in a hurry, the train is one of the more pleasant way to travel to Chumphon. Night trains leave Bangkok at 19:30 / 22:50 daily and arrive in Chumphon between 3:30 and 6:00. 2nd class air conditioned and fan-cooled sleeping carriages and air-conditioned and fan-cooled ordinary carriages available. Ask the conductor to wake you up for Chumporn Station.  Most of the time these comfortable trains are fully booked so a reservation is necessary.

Bangkok Railway station (Hua Lampong) (66) 02 220 4334
 

By Coach

Bangkok to Chumphon: From Southern Bus Terminal (Sai Thai).

Air-conditioned and non-air-conditioned coaches leave the Southern Bus Terminal for Chumphon from about 09:30 to 22:00 daily. The journey normally takes about seven hours.
Bangkok to Chumphon from Khao San Road:

Daily buses departures at 06:00 AM and  20:00-21.00 and arrives in Chumphon at approximately midday and 04:00. Possibly the easiest and most hassle free option.  For advance booking:

www. SeatranDiscovery.com and www.Lomprayah.com

Boat Transfers
From Koh Samui:

1. Songserm Travel provide a daily boat service which leaves from Na Thorn Pier at 10:30. You can catch a minibus from Koh Samui Airport to Na Thorn Pier. (If you catch the first Bangkok-Koh Samui flight, you should be able to catch this boat)
2. Lompraya high speed Catamaran provide a daily boat service which leaves from Wat Pra Lan pier at 08:00 and 12.30.  On-line booking at:  www.Lomprayah.com.  Ok if you can stand their repetitive diving promotional video..

3. Seatran discovery.  Same as Lomprayah but more comfortable when sea is less calm.  www.SeatranDiscovery.com


From Surat Thani: Songserm Travel which departs from Tha Thong Pier 8:00 - 14:30, 455 baht/trip. Koh Tao-Surat Thani, 10:30 - 16:30
The Night boat which departs from Ban Don Pier.

From Chumphon: Songserm Travel provides a daily boat which leaves Ta Yang Pier at 7:00. They also provide regular buses from Chumphon Train Station to their office (about 1 km) and at 06:30, a bus from their office to the pier in time to catch the 07:00 boat. The journey takes 3 hours.
Lompraya and Seatran also provides daily service with departures at 7:00 and 12:00

A very nice stop to made in Chumpon is Fame agency with cheap rooms, nice food, excellent home-baked breads and loads of information to offer.  Fame agency : 077 571077