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Pros
Pro Offers dynamic schedules
You can get real-time airline schedules as XML or SSM/ASM data feed.
Pro Exhaustive reference data
The daily updated database contains full name and IATA three-letter code for every city and airport worldwide; full name and IATA two-character code for every airline (ICAO codes optional for both). Includes country codes, state codes, time divisions and longitude/latitude coordinates; IATA general and specific aircraft codes with corresponding aircraft names, range and speed.