Each promo code under the AirAsia Unlimited Pass can be redeemed for round trip flights, subject to seat availability. For example, in the event a passenger purchases a return ticket, if the seat is not available on the return flight, the discounted fare generated via the promo code will only apply to one way of the journey. Passengers would need to pay the full fare as displayed on the website for the return journey. For the avoidance of doubt, passengers may also redeem the AirAsia Unlimited Pass for one way flights.