The nation's airlines reported more delayed flights and a higher rate of mishandled luggage in February while complaints by passengers jumped nearly 30%.
Meanwhile, complaints against airport security agents dropped slightly.
Airlines reported an on-time arrival rate of 79.6% in February, compared with an 86.2% rate in the same month in 2012, according to statistics released Thursday by the U.S. Department of Transportation.
The rate of delayed or mishandled bags grew to three bags for every 1,000 passengers in February from a rate of 2.64 bags in the same month last year, according to the federal agency.
Complaints against the airline industry jumped to 899 in February, a 30% increase over the 693 complaints in the same month in 2012, according to federal statistics.