An American Airlines Boeing 787-9 Dreamliner approaches for a landing at the Miami International Airport on December 10, 2021 in Miami, Florida.
Joe Raedle | Getty Images
A glitch in a scheduling platform allowed American Airlines pilots to drop thousands of trips in July last night, their union said Saturday, a headache for the airline as it tries to minimize flight disruptions during a booming travel season.
More than 12,000 July flights lacked either a captain, first officer or both, after…