Bangkok Airways flies 3 times a day from Bangkok's Suvarnabhumi Airport (the "new" BKK) to Trat. The flights depart at 08:30, 11:40 and 17:05, and take 1 hour exactly. Costs are between 3,200B and 3,800B return trip.

Direct door-to-door minibus transfers from Trat airport to Ko Chang resorts cost 475 baht/person one way and 800 baht/person return including the ferry crossing. From Bangkok's Suvarnabhumi Airport, take the free express shuttle bus from outside the arrivals concourse to the airport's own bus terminal, and from there the next available bus to either Trat or Chanthaburi, then proceed as described below.

From Bangkok the most economical way to get to Laem Ngop (where the Ko Chang ferry piers are) is to take a 1st class bus #999 from the Eastern (Ekamai) Bus Terminal direct to the Laem Ngop piers. The fare is 275 baht one-way (520 baht return) and takes just over five hours.

There are direct minibus services to Laem Ngop from Pattaya, Ban Phe (gateway to Ko Samet), and Bangkok's Khao San Road and Victory monument (in front of the Payathai hospital). They, however, are less comfortable and spacious than public buses, and you may be charged significantly more by travel agencies selling tickets to these, as often with any tourist-oriented transportation in Thailand.

Most ferries operate from Laem Ngop, which has three piers .
The Laem Ngop (Tha Khrom Luang or Tha Laern Ngop) pier is approximately 700 metres west of Laem Ngop. The Centrepoint (Tha Centre Point) pier is located about 3.5 km north-west of Laem Ngop. These piers serve both vehicle and passenger ferries.