Which airport code belongs to a city in Canada?

YYZ is the airport code for Toronto Pearson International Airport, which is located in Toronto, Canada. This three-letter code follows the International Civil Aviation Organization (ICAO) and International Air Transport Association (IATA) standards used to uniquely identify airports around the world. YYZ is distinctly recognized as a Canadian airport, signifying its connection to one of the largest cities in the country.

In contrast, the other options correspond to airports located in the United States. AGS stands for Augusta Regional Airport in Georgia, TYS represents McGhee Tyson Airport in Tennessee, and ABQ denotes Albuquerque International Sunport in New Mexico. Their respective codes reflect airports that are part of the U.S. aviation system, making them different from the Canadian designation of YYZ.