the PNR must be canceled. This releases the inventory for sale to other customers who are ready to make their ticket purchases. Holding inventory beyond the 24-hour ticketing period is a violation of Delta’s booking policies and directly harms the airlines and other customers by preventing...
The upgrades can be purchased using cash or SkyMiles for any flight segment operated by Delta Airlines. Upgrade Overview You can now purchase any of the following upgrades using either miles or cash, regardless of how your initial ticket was purchased: Delta Comfort+ First Class Delta Premium ...