Paro Airport is the only airport in Bhutan, six kilometres (three miles) away from Paro. The airport is located at a high altitude in a steep valley on the bank of a river, with nearby peaks as high as 5.48 km, and is known as "one of the world's most challenging airports". All flights at Paro are by visual flight rules only and are restricted to daytime hours. According to Travel & Leisure, only eight pilots in the world are certified to land at the airport.
In 2002, the passenger throughput amounted to 37,151 persons and the handled cargo was 90,983 tonnes.