Was excited to read about a fascinating topic but the second paragraph under the 'Express' heading accidentally cites a virtual airline's website rather than Fedex itself — a problem that unfortunately throws into question the accuracy of the rest of the article for me.
Remarkably, FedEx has its own map of every airport it services, along with routes, flight times, operators, and aircraft types. https://fedexvirtual.crewsystem.net/route_map.php