Koh Chang – BANGKOK cheap transport: If you are looking for the cheapest option, the 999 bus at 13:30 near 300 THB from Ferry Ao Thamachat. Call Ferry 100 THB before 12:00 PM. Ferry 80 THB. As you become or more people is a private car or even a plane (2000-3000 THB) is a big better option because the mega mill. Lux Private miniban return ticket only 11,000 THB (max. 9 people). Chassis to the hotel on the island and in bkk. if interested, please send priv to me.
The second cheap Bus option:
1. Taxi to Ferry Ao Thamachat (up to 100 TB). Ferry 80 THB
2. Taxi to Sentun from Ferry for 50 THB
3. Bus Cherdchai Tour from Trad to BKK, near 220 THB as I remember well (every hour they are)
The third option is VIP Bus to Bangkok. Eddy Travel does it for 700 THB (contact for details). Pick up from the hotel by Minibus first. Transfer to a large bus from the “second” ferry. delivers to: Latkrabang (Airport link to airport 1 stop) Rama 9 or Khaosan rd.