You need gates with available slots in both your base (which 2 gates should have been given to you) and your destinations. Then, you need to make sure the route is within the range of the planes. Then go to create routes and create the routes. Click update to adjust the price. Remember to click create to create the route when you are satisfied with the price.
If you still encounter problems, please post your player's id and the aircraft id and we will take a look at it.
