Passengers walks past a union ballot drop box at Charlotte Douglas International Airport, Friday, Nov. 22, 2024, in Charlotte, N.C. (AP Photo/Erik Verduzco)

FILE - A view of Charlotte Douglas International Airport, Friday, Nov. 22, 2024, in Charlotte, N.C. (AP Photo/Erik Verduzco, File)

An union ballot drop box is seen at Charlotte Douglas International Airport, Friday, Nov. 22, 2024, in Charlotte, N.C. (AP Photo/Erik Verduzco)

An union ballot drop box is seen at Charlotte Douglas International Airport, Friday, Nov. 22, 2024, in Charlotte, N.C. (AP Photo/Erik Verduzco)

LaQuanda Harvey, a Prospect airport service worker, votes in favor of a strike at Charlotte Douglas International Airport, Friday, Nov. 22, 2024, in Charlotte, N.C. (AP Photo/Erik Verduzco)