In reality TSH is one of the last holdouts in the regional consolidation that has been happening since the mergers. I’ll probably miss a few, but Mesa went bankrupt and streamlined. Comair shut down in 2012. Lynx is gone. Pinnacle/mesaba/colgan bankrupt to became 9e and eventually would have furloughed if people hadn’t abandoned ship like they did. Republic went bankrupt shed 50seaters and consolidated shuttle America and chautauqua. ASA and expressjet finally merged. Great Lakes is gone.
American eagle is probably the last hold out except the sale of expressjet makes the merger of expressjet and commutair a possibility now.
Tip of the hat to airwisc through all of that.