Some US airlines are taking legal action against the US Department of Transportation. The reason? The new regulation which imposes on airlines the obligation to communicate additional air fares to government bodies in advance. The aim is to improve transparency towards consumers regarding the extra costs associated with air travel. 

The group is made up of the Airlines for America (A4A) association and the airlines American Airlines, Alaska Airlines, Delta Air Lines, Hawaiian Airlines, JetBlue Airways and United Airlines. The companies have filed a petition with the Louisiana Court of Appeals asking for a review of the requirement, arguing that the rule exceeds the government's mandate and that the rule is "arbitrary and capricious, contrary to law, and an abuse". 

The new one provides greater transparency on baggage fees, flight change and cancellation fees before purchasing a ticket. Washington said it "will vigorously defend the rule that protects consumers from hidden junk fees".