Airlines are a grey government agency. If they had to pay the true cost of things like air traffic control, FAA administration and safety regulation, or health costs due to pollution, to say nothing of the non-the-first-time-fat cash payment they just got on top of the huge fact that they are paying little to negative tax rates (all effectively government subsidies of their operations) then not a single airline would be in operation today. The industry exists at the price it exists only with heavy support from the government.