A quick check on the Skybus site shows CMH-BUR(LA) as $100 which translates to a RPM of $0.05/mile or 0.045 with an 80% load. Granted, they try to sell $390 fares. Even if they can manage to get their average fare at $200 this would still be $0.09/mile. The low costs were having a tough time keeping their CASM below that when oil was selling below $50.