If you want to leave Siem Reap by air, be ready to pay 25$ per person. They got some service tax you have to pay to get into customs this cost is not covered by your ticket.
I had a great time in Cambodia but left with a bad aftertaste because of this scam.
#1 pabloeskimo has been a member since 30/6/2009. Posts: 19
Don't visit New Zealand then - you'll be left with the same feeling!
I don't think it's a scam rather than a difference in airline ticketing policy. The airport departure tax isn't included in the ticket price that you have paid and so has to be paid upon departure... They have the same system in New Zealand, Laos (I think - at least last time I visited in 2006) and Thailand used to operate the same system (500B had to be paid before you were allowed out the country). For some reason these countries prefers to collect the departure tax directly from the passenger rather than through the airlines.
I actually think Cambodia now include the domestic departure tax in ticket prices, but the international one still has to be paid upon departure. The Air Asia website states this when you try and book tickets from Cambodia with regard to their all-in fare: "*Not applicable for flights departing Indonesia, Cambodia and Philippines, as Airport Tax is paid separately before departure."