Simplify the following text for a Grade 13 native English-speaking person.
Original: Jinnah International Airport ( previously Quaid-e-Azam International Airport ) is Pakistan 's largest international and domestic airport .
Simplified: Jinnah International Airport previously Quaid-e-Azam International Airport ( IATA : KHI , ICAO : OPKC ) is Pakistan 's largest international and domestic airport .