The best option is the bus, as it's the only available route. Be mindful of the long travel time.
Traveling from Koh Phangan to Laem Ngob Pier is only possible by bus. The journey takes approximately 360 minutes and costs between 450 and 900 THB. Consider the long duration if you plan to choose this option.
The bus is also the cheapest option, with prices ranging from 450 to 900 THB. The downside is the lengthy travel time.
For families, the bus might be challenging due to the long duration. However, it remains the only available option.