Simplify the following text for a Grade 9 native English-speaking person.
Original: The city is served by two international airports and a seaplane terminal : Glasgow International Airport ( GLA ) ( 13 k west of the city center ) , Glasgow Prestwick International Airport ( PIK ) which is approximately 30 miles south west of Glasgow in Ayrshire ( not technically Glasgow ) and Glasgow Seaplane Terminal , by the Glasgow Science Centre on the River Clyde .
Simplified: There are two airports in the city , Glasgow International Airport and Glasgow Prestwick International Airport .