Glasgow International Airport is an international airport in Scotland. It is 6 nautical miles west of the Glasgow city centre. The airport is in Paisley and near Renfrew in Renfrewshire. In 2011, almost 6.9 million passengers passed through the airport. This was 5.1% more than 2010. This makes Glasgow the second busiest airport in Scotland. It is also the eighth busiest airport in the United Kingdom. Glasgow Airport is the primary airport of Greater Glasgow.