Pakistan International Airlines Corporation, commonly known as PIA, is the flag carrier airline of Pakistan. The airline, with its head office on the grounds of Jinnah International Airport in Karachi, is one of the most recognisable airlines in Asia and operates scheduled services to 24 domestic destinations and 39 international destinations in 25 countries across Asia, Europe and North America.[4] Its main bases are at Karachi, Lahore and Islamabad/Rawalpindi. PIA has been ranked as a 3-star airline by Skytrax, the world’s official airline and airport reviewer.