Only on Delta Phone Number, you can buy Cheap Delta Flights with up to a 15% discount! It's time to plan your holidays in the velvet season! The discount is valid for all directions of the Delta Air Lines route network with flights from the US cities: 10% discount from the fare for economy class tickets; 15% discount on the fare for business class tickets; You can buy tickets at a bargain price until October 20, 2021. The flight period is until December 31.