Buses go directly to Centerpoint Pier in Laem Ngop, Trat and depart from the Ekkamai Eastern Bus Terminal in Bangkok at 745 am and 945 pm. The journey takes approximately five hours. Return service departs Laem Ngop at 2 and 4 pm.
In addition, there are 1st class and 2nd bus class services from both the Ekkamai Eastern Bus Terminal and the Mo Chit Northern Bus Terminal that connect Bangkok with the provincial capital of Trat, from which visitors must take a 30 minute songtaew to the port at Laem Ngop, where the boats depart to Koh Chang.
As the owner of the airport in the provincial capital of Trat, Bangkok Airways is the sole air carrier for service to Trat and Koh Chang. There are two flights a day from Bangkok's Suvarnabhumi Airport to Trat. One should be aware that even after the roughly one hour flight from Bangkok to Trat, visitors must still get a 30 minute transfer to the ferry pier at Laem Ngop and take a 45 minute ferry to Koh Chang.
Between the pier at Laem Ngop and Pattaya, Ban Phe, and Bangkok's Khao San Road there are regular direct minibus services. There are also opportunities to procure a minibus from the Cambodian border to Laem Ngop, though these are not as regularly scheduled as those from Bangkok or Pattaya.
Most boats servicing Koh Chang depart from the town of Laem Ngop, which has three piers: The Laem Ngop pier is approximately 700 meters west of Laem Ngop, the 'Centrepoint' Pier is located about 3.5 km north-west of Laem Ngop, and the Koh Chang vehicle ferry pier is located in Thammachat Bay (Ao Thammachat), around 15 km west of Laem Ngop. All ferries can transport both passengers and vehicles and have regular departures, though Centrepoint has the most frequent boat service.
Boats from Laem Ngop arrive at the two piers that are located at Dan Khao on the east coast of the island: Tha Dan Khao and Tha Ferry Dan Khao.
Boats to or from Laem Ngop and Dan Khao complete the voyage in around 45 minutes, while the car ferry from Laem Ngop takes around 1 hour and arrives at the Tha Ferry Dan Kao pier, 400 meters southeast of the Tha Dan Khao pier. The Koh Chang vehicle ferry from Thaammachat Bay arrives at the Koh Chang Ferry Pier (Tha Ferry Koh Chang) at Sapparot Bay (Ao Sapparot), 3 kilometers northwest of the Dan Khao piers.