Workers who clean airplanes, remove trash and help with wheelchairs at Charlotte’s airport, one of the nation’s busiest, went on strike Monday during a busy week of Thanksgiving travel to demand higher wages.

The Service Employees International Union announced the strike in a statement early Monday, saying the workers would demand “an end to poverty wages and respect on the job during the holiday travel season.” The strike was expected to last 24 hours, said union spokesperson Sean Keady.