“The first thing I would say is that we’ve now lived in the deregulated system for 40 years. What we ended up with was a system that failed to achieve the things that the deregulators said it would. We now have a system that is less competitive than it was even during regulation. The top four airlines collectively have a larger market share now than the top four airlines did in 1977. This system of markets and competition has led to massive consolidation and concentration”https://hls.harvard.edu/today/airline-deregulation-may-be-why-flying-is-such-a-miserable-part-of-holiday-travel/