From most of my travels to various places, I realized that since an airport is built on flat land, there's a chance that you could catch a glimpse of a skyline from there. It may not apply to all cities, especially if the airport is far and there are hills/mountains in the way.
Here are some skylines from airports I have experienced before.
New York (Manhattan) from JFK:
https://www.architectsjournal.co.uk/...024442.article
Atlanta from Hartsfield-Jackson:
https://wdanielanderson.wordpress.co...-airport-city/
Charlotte from Charlotte Douglas International:
http://travelwellmagazine.com/2015/0...ts-nest-south/
Dallas from Dallas/Fort Worth International:
https://www.rt.com/usa/346162-shooti...as-love-field/