12/08/2010 12:22 pm ET | Updated May 25, 2011

Southwest Airlines Ranking Slips To Eighth Place For On-Time Arrivals

Southwest Airlines Co., the U.S. industry leader in on-time arrivals since record-keeping began in 1987, finds itself in an unprecedented spot this year: eighth place.

Second a year ago, Southwest is slipping as it expands at congested airports such as New York's LaGuardia while US Airways Group Inc., Alaska Air Group Inc. and other rivals improve their performance, according to federal data released yesterday for the 12 months ended in October.

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