There are cash machines at foreign exchange desks at arrivals and departures. They accept Visa cards but not Mastercard. You will be charged a 11 percent commission plus your own bank’s handling charges but it may save you queuing for 1 plus hours. I was also conned by the lady at the foreign exchange desk, she gave me 3 Peso MN in exchange for 3 CUC. She should have given me 72 Peso MN. I would advise contacting airline on the day of departure to check flight times. You do not want to spend more time in this airport than necessary. So many smokers and poor facilities makes it unpleasant. I know of 2 different parties who contracted serious illness as a result of eating the food here. The beer is more expensive than at the bar at the Nacional Hotel. Duty free does not represent much of a saving but has a good selection, the ground coffee is more expensive for example.