Midwest , already in a financially weakened condition following the September 11 , 2001 attacks and the aforementioned takeover battle , suffered another severe financial blow as a result of the 2008 fuel price spike . Midwest 's fleet of MD-80 airliners had been well suited to its markets and Midwest 's high-service business model during the 1990s , but by 2008 it was no longer fuel efficient as compared with newer aircraft designs . Midwest terminated the leases on those aircraft and returned them to their lessors . Shortly thereafter , as the result of a failed lease renegotiation with Boeing , Midwest also lost the leases on 16 of its 25 newer Boeing 717 aircraft , leaving the airline with only 9 of the 38 aircraft with which it had started the year
September 11 , 2001 attacks
September 11 attacks
Skyway Airlines