Premium seats can cost airlines more than $200,000 each, because expensive finishes and development costs for complex motors are spread over relatively few units, said Robert Mann, an aviation consultant based in Port Washington, New York.
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This doesn't surprise me, given the cost of a first class flight, the fact that customers will abuse it because it's a piece of commercial equipment, they'll expect to have their asses gently coddled for twelve hours, and the FAA regulates the design and execution of everything that goes in a commercial plane.
Dallas to London is around $10,000 round trip for first class. The seats will pay for themselves very quickly. Plus, the luxury will convince various CEOs that your airline is the best thing in the world, so they'll make all their employees use your company when they ride in the shitty seats.