As with any low cost carriers, your flight cost will be very cheap, and every other service you usually get for free on a regular flights, you need to pay extra for! In addition, you often get a lot of the extra services cheaper if you book them with your ticket, instead of paying for them at the terminal or on the plane.

With the Air Asia flight from Perth to Kuala Lumpur, the following are extras that you can pay for in advance if you wish, and get varying degrees of discount if you book early

1. Checked luggage - 15kg for $9.00 if booked online, $13.00 for 15kg if booked at airport check-in. $9.00 per kg after that at the airport, but less (another 5kg for $16.00, and then another 5kg for another $22.00) if booked in advance online.
2. In flights Meals - hot meals for $8.00 if booked online, $9.00 if booked on flight
3. XL seats - only online at time of booking, around extra 100%
4. pre-booking seats - $10.00 each
5. comfort kit - (A light blanket, an inflatable pillow and an eye mask) $11.00 if booked online, $16 on the plane
6. sporting goods luggage - 15kg for $28.00 for golf clubs, bikes, scuba gear and surfboards