I usually fly last minute and 1-way (cause who knows where I'll want to go next) And have always gotten a great price with Air Asia.
Recently, I even booked the same day and got 1-way fare KL to Phuket for $57 USD. Nok Air and Bangkok Air are very competitive as well. But, for me, Air Asia has larger routes (more cities serviced).
The planes are well kept and free seating (like SouthWest in the states)
1 thing to watch out for - all the Asia carriers (Thai Air included) have a 15 kg luggage limitation and charge 5-7 RGT per kg over. So your luggage could be more expensive then your person. If you are returning to an area and do not need all your baggage check with your hotel or lockers at the airport for leaving it behind.


















