I will be travelling to the LOS on a one way ticket; (my one year visa has expired) so I am relying on a 30 day entry.

Can anyone recommend an internet only booking airline for flights to Singapore or KL which will suffice as 'Onward Travel' if I print of a confirmed and paid for booking?

Airasia.com has some good deals if travel date is before the end of Sept.

Sing or KL at 299 baht ++ .......about 2,200 baht with all the tax etc for a one way...remember the 700 baht airport tax is included in the etickets

try tiger airways too. they are cheap also.

Remember the onward ticket doesn't have to be out of Bangkok if you are not going to use it and Phuket to Penang with Firefly is cheaper. You wont get a refund with Air Asia so you may think about a o/w Thai airways ticket which is refundable if not used.