Actually, AA and UA had about 36-37% of the US demosetic market. UA had about 16-17%, AA had 20% after they bought TWA's 4%, so together they had only 36-37%, not 50%. They were big, but so was SWA, so was DAL, so was NWA. Now, with the exception of SWA, they all come tumbling down.

And, it's more like hundreds of thousands of airline employees losing their jobs post 9-11.

Also, when 9-11 occured, JetBlue had about 35 A320s. They now have 85+ 320s and E190s. So they have more than DOUBLED their fleet and capacity, and are only now raising their fares.