In present, almost all of bigger cities in the continent own airport. The same is in USA, Canada or Australia. Buying flight tickets is a lot more common for everyone, then it was 15 years earlier. But there are couple big airfields in the world, extents of it are sometimes larger then size of a small town. Airports like that are capable to send people to antipodes with one tour! They are so big, that sometimes you may need a map to avoid getting lost.