Atlantic Coast Airlines: 95.6% (60.2%)
Spirit Airlines: 94.9% (80.3%)
Delta Air Lines: 93.0% (69.0%)
US Airways: 90.4% (83.2%)
America West Airlines: 89.6% (75.1%)
American Trans Air: 86.2% (69.2%)
United Air Lines: 85.8% (80.0%)
American Airlines: 85.4% (78.8%)
Northwest Airlines: 83.5% (77.6%)
Continental Airlines: 82.6% (76.1%)
Air Wisconsin Airlines: 81.4% (59.4%)
Midwest Airlines: 78.3% (80.8%)
JetBlue Airways: 78.0% (69.6%)
Aloha Airlines: 76.0% (68.7%)
Frontier Airlines: 75.6% (71.6%)
Alaska Airlines: 74.8% (68.0%)
AirTran Airways: 73.7% (64.3%)
Hawaiian Airlines: 72.1% (64.7%)
Skywest Airlines: 67.5% (62.2%)
Horizon Air: 64.6% (57.9%)
Atlantic Southeast Airlines: 63.7% (58.3%)
Comair: 63.7% (56.9%)
ExpressJet: 63.1% (60.0%)
Southwest Airlines: 62.8% (60.6%)
Mesa Airlines: 61.2% (58.0%)
Mesaba Airlines: 61.2% (58.0%)
American Eagle Airlines: 59.2% (55.0%)
Continental Micronesia: 59.1% (57.6%)
Executive Airlines: 59.1% (58.9%)
Trans States Airlines: 57.2% (55.8%)
North American Airways: 50.1% (26.4%)

Very telling stat about how healthy some of these airlines are, and how unhealthy some are...amazing how all of the legacies are above the "glass ceiling" of 80%...