Air France formally Société Air France stylized as AIRFRANCE, is the French flag carrier headquartered in Tremblay en France. It is a subsidiary of the Air France KLM Group and a founding member of the SkyTeam global airline alliance.Air France formally Société Air France stylized as AIRFRANCE, is the French flag carrier headquartered in Tremblay en France. It is a subsidiary of the Air France KLM Group and a founding member of the SkyTeam global airline alliance.