No, there is no defined maximum number. As the number of flights increases the performance of the globe view start to decrease though. YourFlights has been tested with up to 10,000 flights on the globe with satisfactory performance.
You can search for airports in three different ways: name of the airport itself, name of the municipality or IATA code. If you cannot find an airport straight away, try to search with all three different methods. Please note that the airport database only includes airports with valid IATA codes. If you believe there is an airport missing please contact us.
To prevent accidental duplicates, YourFlights treats two flights as the same when they share the same date, route and airline. If you really flew more than one of them on the same day, make each flight unique by adding a different flight number or a different departure time. Once they differ, every flight is saved and counted separately.