ASU is a unique code, commonly called an IATA code, used in the aviation industry to identify airports. This code, along with many others, are defined by IATA (International Air Transport Association). A ASU flight refers to a flight to Asuncion Silvio Pettirossi Airport.
For a flight to Asuncion, you will be flying into Silvio Pettirossi. Asuncion Silvio Pettirossi (ASU) is just 12.6 km from the centre of the city.
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