More U.S. flights are arriving on time and airlines are losing fewer bags, yet more consumers are complaining about air travel.
Traveler complaints jumped 34 percent last year, to the highest level since 2000, according to an annual ranking of airline quality from Wichita State University and Embry-Riddle Aeronautical University. The top frustration: "problem flights," which include delays and cancellations and has been the No. 1 gripe for 16 years.
The latest report, released Monday, reviewed public information from the U.S. Department of Transportation to rate the airlines for on-time performance, baggage handling, bumping passengers because of oversold flights and complaints filed with the government.
How did the individual airlines score? Click ahead for a look at the researchers' rankings of top U.S. airlines.