Alright here is something ridiculous. You have to buy the flight path from each individual city. So if you buy Cape Town from Harare you can only go to Cape Town from Harare. If you also want to fly there from Johannesburg you have to buy that too.
So far the game is fairly fun but there are some definite problems with it. The first and most important is that getting other flight paths costs real money which heavily limits the player since not only are you stuck flying around the same three cities you can't even progress in the storyline. I know you can get at least one ticket from leveling but that takes such a long amount of time people are going to quickly get board of the game and quit playing.
I'm all for developers making money off the games but the way to do it is not by limiting what the player can do and gating off content behind pay walls or time barriers. If you want people to spend kreds then you should do it by letting them spend money on aesthetics such as how their character or plane looks. Having small purchases for bigger fuel tanks or more durability is fine as far as it goes but forcing them to pay to unlock content like where they can go is ludicrous.