Delta Connection operated by Atlantic Southeast Airlines flew to Delta's Atlanta hub. In 2007 Delta Connection had two nonstops a day to ATL with Canadair CRJ-200s for Delta Air Lines in a codesharing agreement. This service ended in 2012 and Delta no longer serves McAllen. Prior to the merger of Northwest Airlines with Delta in 2010, Northwest DC-9s flew nonstop to its Memphis hub in 2004, followed by Northwest Airlink nonstops to MEM on codesharing partner Pinnacle Airlines Canadair CRJ-200s in 2009.