- MIT Airline Data Project
- Air Transport Association
- Arab Air Carrier Organization
- AirlineInfo.com
- Airline Network News and Analysis
- Airports Council International
- Association of European Airlines
- Bureau of Transportation Statistics
- Centre for Asia Pacific Aviation
- International Air Transport Association
- International Civil Aviation Organization
- Justin Bachman, Business Week
- Holly Hegeman, PlaneBuzz
- Terry Maxon: Dallas Morning News
- Scott McCartney, Wall Street Journal
- John Macilree
- Ben Mutzabaugh, USA Today
- Greg Principato, ACI-NA
- Ted Reed, TheStreet.com
- Loren Steffy, Houston Chronicle
- Aviation Week, Things With Wings
- Flightglobal, Airline Business
- Perspectives from Mike Swiatek