Continental Airlines yesterday detailed route closures stemming from its decision last week to downsize, leading to a mainline system capacity reduction of 6.8% year-over-year in the fourth quarter. From Sept. 3 it will discontinue a number of routes. Most prominently, it will stop flying Houston Intercontinental-Washington Dulles, IAH-Oakland, Newark-Cologne, EWR-Salt Lake City, Cleveland-IAD and Guam-Bali. Other destinations it will stop serving from its IAH hub include Cali, Chattanooga, Guayaquil, Hartford, Monclova, Montgomery, Palm Springs, Reno, Sarasota and Tallahassee. In addition to CGN and SLC, it will cease operating from EWR to Austin, Birmingham, Charleston (S.C.), Charleston (W.Va.), Cincinnati, Des Moines, Detroit, Green Bay, Greensboro, Lexington, Little Rock, Memphis, Nashville, Norfolk, Oklahoma City, Omaha, Ottawa, San Antonio, San Diego, Sarasota, Savannah, Toledo and Tulsa.