The Stats page in the Menu

Stats are the statistics of the airline you are running in Pocket Planes. While in the Stats section, you can see your Airline Value, Average Daily Revenue, Airports, Population Serviced, Total Flights, Miles Flown, Passengers Delivered, Cargo Delivered, Longest Flight, Most Profitable Flight, Busiest City, and your Busiest Region. A graph showing your revenue, miles, and flights is also displayed, and your top earning plane is in the lower left corner. Everyday at a set time, the graph updates.