Add a column for City Code?

[nx01-a]

Airports in larger metropolitan areas have an alternative city code that is supported by GDS engines. For example: ORD, MDW, and RFD are all under the Chicago city code of 'CHI'; LGA, JRK, EWR are NYC; HND & NRT are TYO, and so on.

Some of these airports have the code in the Keywords section- but it would be helpful to have their own field in the dataset for just this purpose.

[davidmegginson]

Excellent suggestion -- thank you!

[galvesribeiro]

Hello! Was the City/Metropolitan code ever added?

Thanks!