Independence and Mango Creek Airport (INB). So much to see, so little time. Before you set off in your rental car and explore the area, we'll get you up to speed on the basics.Once you've grabbed your belongings from the baggage claim area of Independence and Mango Creek Airport (INB), get set to jump into the driver's seat of your rental car and make your way into Belmopan. The central area is about 47 miles north of the airport terminal.