Delta Air Lines will postpone the launch of direct flights between Atlanta and Riyadh, the capital of Saudi Arabia, until March following several attacks by Yemenโs Houthis on the cityโs airport, the company said in a statement. Delta had planned to launch the service on October 23, operating wide-body Airbus A350-900 aircraft. The flight was set to become the first direct commercial service between the United States and Saudi Arabia, CNBC noted.