Delta Air Lines will maintain its capacity caps in place through Sept. 30, the carrier announced Wednesday. The current seating limits include blocking all middle seats and capping seating at 60 percent in its economy and premium economy cabins, 50 percent in First Class cabins and 75 percent in Delta One cabins. In a recent interview with BTN, chief customer experience officer Bill Lentsch said the carrier will add capacity to markets where demand increases beyond that capacity limit. Delta also announced that it would restore automatic advance Medallion Complimentary Upgrades on June 10.