The Transportation Security Administration (TSA) has cautioned that a looming government shutdown could lead to longer wait times for travelers at airport security checkpoints. The warning comes as the TSA announced it is expecting a record 40 million airline passengers to take to the skies over a two-week period that began Thursday. 

Most TSA workers, about 95%, are considered essential, and would therefore remain on the job in the event of a shutdown — but without pay — TSA administrator David Pekoske said in a post on X.

Air traffic controllers are also deemed essential employees and would be asked to work while foregoing a paycheck. Employees would be paid after a shutdown were to end.

Here is how a government shutdown will affect air travel for consumers.

Will the government shutdown affect flights?

Not for now. Passengers will still be able to travel on flights they have booked, with operations expected to continue as normal at least in the early days of a shutdown. That’s because TSA agents, air traffic controllers, and other essential airport staff will remain on the job. 

Will TSA screening lines be longer?

While passengers are always advised to arrive at the airport earlier than usual during peak travel periods, that advice could be even more applicable in the event of a shutdown. 

“While our personnel are prepared to handle high volumes of travelers and ensure safe travel, please be aware that an extended shutdown could mean longer wait times at airports,” the TSA’s Pekoske warned. 

“My advice? Arrive at your airport early, with plenty of time to park your car, check your bags and make your way through security,” he added. 

The last government shutdown in 2018-2019, lasted 35 days. While TSA officers were also deemed essential then, the number officers who called out sick rose as the shutdown dragged on and financial woes ensued. 

“It was after TSA officers started missing paychecks that you saw the sick call numbers increase,” said senior CBS News senior transportation and national correspondent Kris Van Cleave. “There may not be an immediate impact at all airports, particularly if it is a short shutdown. If it drags on, then you have a workforce that is among the lowest-paid government employees,” he said.

If, in the event of a prolonged government shutdown, TSA employees stop showing up to work in significant numbers, wait times at security screening checkpoints would likely increase.

What about air traffic controllers?

The Federal Aviation Administration (FAA) is already grappling with a shortage of air traffic controllers, who are responsible for securing the national airspace by guiding takeoffs and landings and ensuring that aircraft don’t fly too close to one another. About a month into the last shutdown, LaGuardia Airport temporarily delayed flights because of staffing shortages, including among air traffic controllers. 

In the event of a shutdown, the more than 14,000 air traffic controllers in the U.S. would be expected to show up to work without pay.

What would a government shutdown mean for passport processing?

According to the State Department’s contingency plan, consular operations will continue as normal “so long as there are sufficient fees to support operation,” given that they are integral to national security. That includes passport and visa services. 

Still, some passport services could be limited, if they are located in buildings run by another agency that is inoperational.  

Washington — Homeland Security Secretary Alejandro Mayorkas warned Friday that his agency could suffer “serious” consequences if Congress fails to pass legislation funding federal agencies and averting a government shutdown in the next few hours.

In an interview with “Face the Nation with Margaret Brennan,” Mayorkas said many components of the Department of Homeland Security would be affected by a lapse in funding, including the Transportation Security Administration (TSA), FEMA and Border Patrol.

The homeland security chief added that a failure by lawmakers to pass a stopgap spending bill before Saturday would also mean staff at the Countering Weapons of Mass Destruction Office would be redirected to other parts of his department.

“The implications and the consequences are serious, especially when it comes to Homeland Security,” Mayorkas said.

He urged Congress to approve legislation that would keep government agencies operating before midnight, when a short-term extension enacted in September will expire.

House Speaker Mike Johnson unveiled earlier this week a legislative package negotiated with Democrats that would have extended government funding through March 14, provided more than $100 billion in disaster aid for states impacted by extreme weather events, and given members of Congress a pay raise, among other provisions.

But the proposal was swiftly met with pushback from some conservative Republicans, who balked at the size and scope of the 1,550 page deal. Crucially, it was also criticized by billionaire Elon Musk, an ally of President-elect Donald Trump, and then by the incoming president himself.

Trump and Musk torpedoed the package, with Musk taking to X, the social media platform he owns, to lambaste provisions of it. The president-elect further upended negotiations over a funding deal when he called on Republicans to address the debt limit — which is set to be reinstated Jan. 1 — in their plan.

Johnson unveiled a second measure Thursday, which would have funded the government for three months, suspended the nation’s borrowing limit until January 2027 and provided $110 billion in disaster relief. The more tailored legislation, which Trump backed, also included health care provisions, a one-year renewal of the farm bill and funding for rebuilding the Francis Scott Key Bridge in Baltimore, which collapsed in March.

But that package failed to pass the House with the necessary support after it was opposed by most Democrats and more than three dozen Republicans.

That defeat sent Johnson and GOP leaders back to the drawing board, with the prospect of a shutdown rising with each passing hour. Republicans are now discussing voting on three provisions of the package individually, sources familiar with the matter told CBS News: a clean extension of government funding; billions of dollars in disaster aid; and assistance to farmers.

Mayorkas told “Face the Nation” that a shutdown just before the holidays — when tens of millions of Americans are traveling — would mean TSA employees at airports throughout the country would be forced to work without pay. However, they would likely receive backpay after a shutdown ends, as has happened before after previous funding lapses.

“We’re going to have tens of thousands of TSA employees working an incredibly high volume of passenger traffic throughout our airports across the country, and they will be doing so keeping the American public safe without pay,” he said.

The Homeland Security secretary also said those impacted would include U.S. Border Patrol agents stationed along the U.S.-Mexico border. 

“There are people in government service who are dedicating their talent and their energy to the well-being of the American people, who rely on their paychecks to make ends meet, and it is the holiday season, after all, but our men and women on the border will be guarding the border of the United States at no pay if funding doesn’t come through,” Mayorkas said.

The $110 billion in disaster assistance that will likely be included in a spending deal includes money for FEMA, which has been responding to the hurricanes that devastated the southeast this fall.

Mayorkas said that inaction by Congress would impact those states hit by the storms, including North Carolina and Florida.

“What FEMA will need to do, another significant impact of the failure to fund the federal government, is they will now need to delay — they’ll put on pause certain contracts, certain projects that are actually repairing communities devastated by extreme weather events, by tornados, by hurricanes, by fires, and that will delay the rebuilding of communities and really delay the ability to deliver for people who have suffered so much,” he said.

Mayorkas said a shutdown occurring over the holidays would force the Department of Homeland Security to “make difficult decisions now to delay projects.”

Lawmakers representing those storm-ravaged states have pushed for disaster relief to be included in any legislative package funding the government.