I don't think an airport being outside of the city limits is that unusual, either. E.g. the "new" Munich airport, all Paris airports (though you could argue th

I don't think an airport being outside of the city limits is that unusual, either. E.g. the "new" Munich airport, all Paris airports (though you could argue that it's Paris which has unusually small city limits), Glasgow, London Gatwick, Stansted and Luton, San Francisco, …