The ticket is not bookable - why not?

There could be many reasons: the trip is full, the trip was canceled, the online booking period is over/hasn't started yet, and the route is too short for online bookings.
If it is not bookable, you can do nothing about it. Please pick a different connection.

Tags: Thailand, Thai Railways

Thai Railways

OK

I don't have a booking number. I have not purchased a ticket yet.