Airline Club

The slot system makes sense irl, an airport only has so many possible takeoffs and landings. It does encourage players to spread out their routes and networks a little bit, but it is currently hard to visualize unmet demand. Airports do expand if the airport has enough demand and is making enough money. 30 year ago my local airport was only international because Canada isn't that far from my hometown in Portland. Now we have non stop flights to Europe and Asia thanks to a couple of expansion projects.