Delta Air Lines made this announcement:

Saying this summer was a busy one would be a significant understatement. No matter how you slice the data — number of customers carried, flights flown, destinations served, irregular operation days handled — there were records made and broken during the all-important period between Memorial Day and Labor Day.

Between May 24 and Sept. 3, Delta flew nearly 60 million customers, including the airline’s new record customer enplanement day on July…