The International Association of Machinists and Aerospace Workers Union is active in more than 200 basic industries as defined by the US Department of Labor. It maintains one or more agreements with almost every major employer in the USA and Canada.

The Independent Pilots Association represents the over 2000 crewmembers that operate UPS aircraft world wide.

The Australian Federation of Air Pilots operates as both a trade union and a Professional Association of all Air Pilots in Australia. Its role as a union to protect and improve conditions of employment of its members.