I will be travelling from koh samui to bangkok at the end of November.
I was wondering if anyone knows the cheapest way to do this.
I don't mind how long it takes or going by bus or train..
I have checked the plane prices and they seem to be more expensive than I thought.
Once on Samui, check with any travel shop about ferry prices back to Surat Thani. All the travel shops will try to sell you a combo boat, bus ticket back to BKK. The problem with this option is that the theft rate on the private buses is much higher than using the gov't bus system. Keep your valuables close and keep a good grip on them if you choose this option. Doing a bit of reading, your cheapest option is probably ferry back to ST, city bus to train station, 3rd class train back to BKK. Good luck.