Train 39 / 41 from Bangkok to Hua Hin is an air-condition Diesel Railcar service (also known as Sprinter Trains) and they are the fastest of all services on this route.
2nd Class seats (air-conditioned).
The ticket price also includes a meal and soft drinks, served by the onboard steward or stewardess..
These Sprinter services are made up of just a few carriages, all of which are 2nd class, air-conditioned seat coaches.
The reclining cushioned seats are quite comfortable and arranged in pairs along the carriage.
As the number of seats are limited for these services, advance booking is highly recommended.
Due to the fact these are the fastest trains on the Thai railway network, they are quite popular with booth locals and tourists.
This is a long distance service terminating in Yala (deep in the south of the country) and seats can often be sold out weeks in advance.
Advance tickets are available 30 days in advance for this sector from Bangkok to Hua Hin (90 days for longer trips).
To book tickets for this train you can:
1) Visit any SRT railway station and buy your tickets in person.
Extra booking fees apply to online ticketing, but it saves you a journey to the station.