Beginning 1 April 2011, travelers departing Cambodia by air will no longer need to queue to pay the airport departure tax. The US$ 25 fee has been included in ticket prices since 21 January 2011, for departures on or after 1 April. According to the Phnom Penh Post, if you purchased tickets before 21 January for an April or later departure, you’ll still need to pay the tax at the airport, and if you change your plans you may be due a refund.