Purdue and Wichita State universities used Department of Transportation data to rank the top major U.S. airlines in 2012. The study examined on-time arrivals, mishandled baggage, bumpings due to overbooking and consumer complaints. Here's how the airlines rank.
14. United Airlines -- On-time arrival percentage: 77.4 percent
Involuntary denied boardings per 10,000 passengers: 1.83
Mishandled bags per 1,000 passengers: 3.87
Complaints per 100,000 passengers: 4.24
13. ExpressJet -- On-time arrival percentage:
Involuntary denied boardings per 10,000 passengers: