Travelers frustrated by long security lines may not see immediate relief, even as Transportation Security Administration officers begin receiving pay again on Monday after working without wages for more than a month during the partial government shutdown.

President Donald Trump signed an executive order Thursday directing federal officials to ensure that TSA workers are paid despite the shutdown, breaking a more than 40-day stretch in which officers went without salaries.

But the move is unlikely to bring instant relief at airport checkpoints, according to former TSA Administrator John S. Pistole.

“It’s a temporary fix,” he told NBC News.

The more pertinent question, he said, is how many workers actually return to their posts now that paychecks are set to resume Monday.

More than 500 officers have quit during the shutdown, according to the Department of Homeland Security, while thousands more have called out because they can’t afford basic expenses.

TSA callout rates reached a high of 12.35% of the workforce on Friday, accounting for more than 3,560 employees, a DHS spokesperson said Saturday. The department added that at Trump’s direction and under Homeland Security Secretary Markwayne Mullin, TSA has “immediately begun the process of paying its workforce” and that officers “should begin seeing paychecks as early as Monday, March 30.”

Those shortages have forced travelers to contend with missed and canceled flights, long security lines and growing uncertainty around air travel.

If most officers report back beginning Monday and airports are able to restore staffing, wait times could start to ease within several days to a couple of weeks, Pistole said.

“It really depends on that asterisk of how many people show up,” he said.

Some workers who left may already have other jobs lined up, raising questions about whether some will return at all.

“How many of them come back after they get this paycheck? Or maybe they already have another full-time job lined up, they’re just waiting to inform TSA after they get their check on Monday,” Pistole said. “So there are a number of variables there.”

Pistole said the uncertainty, coupled with TSA’s typical annual attrition rate of about 7%, could mean delays will continue even after pay resumes.

Until then, some travelers may want to consider alternatives such as driving, rail or bus.

“I think many will and are looking at those options to say, ‘Is that more reliable? Because the last thing I want to do is get to Bush International Airport in Houston and have a four-hour wait,’” Pistole said.

Colombian officials discovered a body Friday amid the search for a U.S. flight attendant who went missing in the country last weekend.

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Medellin Mayor Federico Gutiérrez announced the discovery in a post on X, saying that “a lifeless body has just been found between the municipality of Jericó and Puente Iglesias,” in the northeast region of the South American country.

The mayor said the body was likely that of Eric Fernando Gutierrez Molina, a 32-year-old American Airlines flight attendant from Texas who vanished while out with colleagues in Medellín, Colombia, during a layover.

“There is a very high probability that it is this person. The lifeless body is being transported to legal medicine in Medellín for identification and recognition,” Gutiérrez wrote on X. “We express our solidarity to his family and friends. I have just personally delivered the painful news to his father, who is in Medellín.”

Gutiérrez also said authorities suspect foul play, adding that officials “have very clear leads on those responsible” and calling for those individuals to be sought through extradition.

The mayor said he informed the U.S. ambassador to Colombia of the discovery. The State Department did not immediately respond to a request for comment, nor did Gutierrez Molina’s family.

In a news briefing, Medellín Security Secretary Manuel Villa said Gutierrez Molina was in Colombia on business and was out in the city of Itagüí with two co-workers that he identified as a man and a woman. Gutierrez Molina and the man then left the first establishment to go to a second location with others, also in Itagüí.

“And from there, once they left, there has been no further information on the whereabouts of Eric,” Villa said. “The woman arrived at the hotel where she was staying. However, she arrived somewhat disoriented.”

Villa said law enforcement have determined through their investigation that Gutierrez Molina and the woman encountered individuals “with a history of committing theft under the influence of scopolamine.”

The investigation remains under investigation and national police are still deployed throughout the area, Villa said.

Gutierrez Molina’s sister, Mayra Gutierrez, said in a phone call earlier this week that her brother had been out with another crew member over the weekend. She said the family last heard from him in the early hours of Sunday and confirmed that he worked for American Airlines.

American Airlines did not immediately respond to a request for comment. In a statement earlier this week, the airline said it is “actively engaged with local law enforcement officials in their investigation and doing all we can to support our team member’s family during this time,” but did not mention Gutierrez Molina by name.