Hi and welcome
Not too sure what you are looking for but here is the default for New York and London as an example (you can buy upgrades to make it pretty lifelike)
Manhattan
London
As for airports -- what airport can you not find? Agreed not all are in real life detail but most main airports are pretty good with runways in correct places etc. Like I say this is all default and you can upgrade if you like. Personally I prefer not to.
Miami Airport
Simplicity is the ultimate sophistication. – Leonardo da Vinci