If the offers provided by buses do not suit your needs, trains and carpooling could represent a good alternative for this distance.
Despite being extremely cheap, the bus is also very slow and getting from Ayutthaya to Surat Thani by bus will take you a while. You could consider travelling by plane, getting low-cost tickets if you can book in advance.
Travelling by bus to Surat Thani from Ayutthaya: how many daily connections are there?
If you want to go from Ayutthaya to Surat Thani by bus, there is only one daily connection. Thus, please be very careful when you select your ticket. In addition, please arrive early enough at the bus station. Arriving at the station half an hour before the departure of the bus is strongly encouraged in order to take zero risk.
When do the first and last buses from Ayutthaya to Surat Thani leave?
The journey from Ayutthaya to Surat Thani takes 13 hours and 5 minutes. While the first bus leaves from Ayutthaya at 14:04, the last one is scheduled at 14:04.
Which bus companies are in service in the route Ayutthaya - Surat Thani?
There are many companies cooperating with virail, among which also Win 91 Ayutthaya with buses to Surat Thani.