Delta goes way up, United goes way down in July on-time numbers
Dallas Morning News - 10:02 AM

Delta Air Lines improved its on-time number by 10 percentage points in July, while United Airlines saw a 10-point drop compared to July 2010.
As a result, Delta jumped nine places, from 15th to sixth, while United dropped 10 places from third to to 13th in the U.S. Department of Transportation rankings for the month.