Union officials suggested that while some people were calling off to protest the lack of pay, others had to work additional jobs to pay bills or care for their children.
A union leader told CNN as many as 170 TSA employees at New York’s JFK International Airport called out each day this week.
The union, the American Federation of Government Employees, did not return a request for comment Friday.
DFW Airport spokesman Casey Norton said waits at security checkpoints in recent weeks have been in line with holiday travel periods in previous years.
TSA spokesman Michael Bilello said the agency is closely monitoring the situation and acknowledged wait times could increase depending on the number of employees who call out sick.
“Call outs began over the holiday period and have increased, but are causing minimal impact given there are 51,739 employees supporting the screening process,” he said in a statement.
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