When first starting, you do not need to fly long routes. Use Captain Joe to help you. You can easily generate money by deploying them to the closest destination to boost your experience. This will work well until you reach level 10. As you make progress, your goal is to provide longer routes for your client. Get rid of planes that cannot fly too far. By doing this, you can earn lots of coins in the long run without having to log in every few minutes to unload those planes. Longer routes will hold your money to the maximum allowed before you can collect money from your plane.