The combination of higher urbanisation in Australia with lower overall population also has a more insidious consequence: there are also fewer places with sizable populations to fly to. The business gravity centres are concentrated in Melbourne and Sydney with few other places left that would warrant travelling with a small aircraft. It's perhaps no surprise that the Sydney-Melbourne route is one of the world's busiest air routes with 54,102 flights in 2018 according to OAG.com. By comparison, you'd have to New York-Toronto is just at 17,038 flights while the first US domestic route is Los Angles-San Francisco with 35,365.
On the eastern seaboard of the US, the destinations within a 2/3 hour radius are just countless. That's no surprise that their infrastructure is also spot on.
Last edited by Okihara; 23rd Jul 2019 at 11:54.