I often see in these forums very interesting data about airline flight schedules. For example, number of daily departures by airline from a certain city, number of departures by fleet type, etc.
What is a good source for this type of airline flight data? Ideally, I'd like to be able to get an Excel spreadsheet with my requested data (e.g., all departures for DL from ATL) so that I can analyze by sorting, making pivots, etc., in Excel.
Can anyone point me in the direction of a user-friendly data source? It's fine if it requires a subscription fee.