Air France has estimated that a strike by pilots in September will cost it about €500 million lost revenue, in addition to intangible damage to its reputation. The struggling French-flag carrier was in dispute with pilots over plans to expand its budget subsidiary Transavia.![](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHZpZXdCb3g9IjAgMCAxIDEiPjxyZWN0IHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIGZpbGw9IiNjZmQ0ZGIiLz48L3N2Zz4=)