Southwest Airlines trails Delta for September...

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Southwest Airlines, the dominant carrier at Baltimore/Washington International Thurgood Marshall, ranked second in September for on-time performance. Delta (NYSE: DAL) came in first, finishing September with an impressive 88 percent of its flights arriving on time, according to data from airline and airport data provider OAG. The United States Department of Transportation considers a flight to have arrived on time if the plane reaches the gate within 14 minutes of its scheduled arrival time. The…