adcelannotate = {"mobilepaywallcategory" : "MOBILE_PREM-BUSINESS","nativepaywallcategory" : "NATIVE_PREM-BUSINESS"};DALLAS — The wave of consolidation that swept the U.S. airline industry has markedly reduced competition at many of the nation’s major airports, and passengers appear to be paying the price in higher fares and fees, an Associated Press analysis has found. Over the past decade, megamergers reduced nine large U.S.