Vans with air-con to/from the Surat Thani airport cost around 70B per person. They’ll drop you off at your hotel. Purchase tickets at travel agencies.
Orange buses run from Phun Phin train station to Surat Thani every 10 minutes from 6am to 8pm (15B, 25 minutes). For this ride taxis charge 200B. Other taxi rates are posted just north of the train station (at the metal pedestrian bridge).
Taxis from Surat Thani to Don Sak pier cost around 500B; Phantip Travel (0 7727 2230; 442/24-5 Th Talat Mai) runs frequent vans for 60B per person, but this is included when you buy a ferry ticket.
Around town, sǎwngthǎew cost 20B, while sǎamláw (three-wheeled vehicles) charge about 150B to 200B per trip.