Comment by Arainach
>None? Nobody puts airports inside city centers and metro areas don’t just have dense urban housing.
https://en.wikipedia.org/wiki/Midway_International_Airport
It's hard to project growth. Things build right up to the limit of the airport for convenient access, then the area grows and the airport needs to grow - and what do you do? Seattle-Tacoma is critically undersized for the traffic it gets and has been struggling with the fact that there's physically nowhere to expand to.
Zoning is one option to direct growth, but you can move airports. Chicago is right next to a Great Lake and there’s relatively shallow areas ready to be reclaimed etc.
Obviously you’re better off making such decisions early rather than building a huge airport only to abandon it. Thus it’s called urban planning not urban triage.