They have been building an airport on Koh Phangan for many years but it remains unfinished:
https://en.wikipedia.org/wiki/Ko_Pha-ngan_Airport
There is also a new ferry from Pattaya to Samui if you have time:
www.easia-travel.com
https://en.wikipedia.org/wiki/Ko_Pha-ngan_Airport
There is also a new ferry from Pattaya to Samui if you have time:
THAILAND – Koh Samui new Ferry Cruise Between Pattaya and Samui Completes Test Run
Samui Cruise hosted a launch party in Koh Samui after its test run for a new cruise ferry route between Koh Samui and Pattaya. The service is expected to launch later in the month though exact departure dates have not been set.