NEW YORK (Standard&Poor's) April 15, 2011--Standard&Poor's Ratings Services has raised its on Austin, Texas's airport system revenue bonds to 'A' from 'A-'. The outlook is stable. "The upgrade reflects our view of sustained financial performance and solid enplanement trends in the past three years relative to those of other airports across the U.S.," said Standard&Poor's credit analyst Peter Murphy. Austin Bergstrom International Airport (ABIA) has a strong origin and destination market (more than 95%) and good diversity of carriers with Southwest Airlines Co., American Airlines Inc., and Continental Airlines Inc. accounting for 79% of enplanements in 2010. It has experienced solid enplanements growth, with passenger traffic rising an average of 4.5% a year during
