A sophisticated passenger flow system is featured in the game. All of the cities are actual, and their populations are identical to their real-life counterparts. The more people there are, the more people want to fly somewhere. Each passenger has their own destination, and if there are no direct routes, they will fly with transfers. You won’t have enough money to connect each city to the rest of the world, so you’ll have to assess the situation and decide where the transportation hub will be located.