Has anyone ever taken the bus from Siem Riep to Trat?

I am taking my father there, Cambodia, and then hoping to meet up with some friends in Koh Chang on the way back.

Any information would be greatly appreciated.

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You can get from Siem Reap to Koh Chang by bus the same day without too much hassle. Leave Siem Reap as early as possible, if you want to spalsh out or if your Dad isnt into riding in the back of a pick up for long distances on an unmade road, then get a taxi to take you to the border.

From the border you want to get a bus to Chantaburi, try to get to Aranyaprathet Bus Station as most buses that are at the border crossing are going to Bangkok. From Chantaburi get abus going to Trat or if you are lucky you might get on one that is heading to the ferry piers.

Had guests at our place who have done this trip in this way in the past month.