Flights
The flights are broken up into code A and Code B flights. Code A flights are to a destination, and the code B flights are return flights from Code A. You will find that code A and B flights have the same flight number, just different codes. Mix and match the A and B flights to make your flight line with 3500+ flights available. You must complete the flight line by ending up at the same airport (unlimited stops) where you started. Then you can start a new flight line.