• TSA agents are a hot topic as scores quit and call out sick during the partial government shutdown.
• Agents undergo up to six months of rigorous training to ensure they can spot prohibited items.
• Take Business Insider's quiz and see if you know what you can — and can't — bring on the plane.

Do you have what it takes to be a TSA agent?

Transportation security officers don't only screen passengers and luggage, but also ask travelers security questions and look out for suspicious activity.

From the X-ray machine to pat-downs, it takes substantial training to ensure agents can spot prohibited items. Becoming a TSA agent takes four to six months.

And sometimes, what's prohibited might not be as obvious as you think. While there are definite no-nos — like weapons — other banned items are a little more unexpected.

With that in mind, Business Insider created a quiz on passengers bringing items through airport security and take into the cabin with them.

Try it below to see if you know what's allowed and what's not in your carry-on:

TSA issues persist

Staffing shortages are causing enormous lines at airport security checkpoints right now and putting severe pressure on TSA workers.

Large numbers have been calling out since the partial government shutdown began on February 14, which stopped TSA staff from being paid. More than 400 have quit entirely.

The Department of Homeland Security says this leaves "critical gaps in staffing."

"TSA simply cannot afford to lose its screening workforce as it takes four to six months to train new recruits."

During the shutdown, Immigration and Customs Enforcement agents have been deployed to 14 US airports.

That's drawn criticism from many in the aviation industry, including flight attendants' unions, which accused politicians of using workers as "pawns in this dangerous game" in a Sunday statement.

On Tuesday, the Association of Flight Attendants created an online reporting form for its members to flag incidents, like ICE agents "doing work they are not trained to do, such as screening passengers and baggage."

• Houston and Atlanta airports are warning travelers of four-hour security lines.
• Delta, United, and Allegiant have waived some fees to give passengers rebooking flexibility.
• TSA agents have been calling out of work as they aren't being paid due to a government shutdown.

Some airlines are waiving change fees for passengers affected by hourslong waits at airport security.

Delta Air Lines, United Airlines, and Allegiant have issued advisories giving travelers more flexibility during the ongoing travel chaos. Most airlines eliminated most change fees after the COVID pandemic, but many still charge them for changes to basic fares.

Due to a partial government shutdown, TSA agents have been working without pay since February 14. As a result, more of them have been calling out of work.

As many as 10% of all TSA agents called out on several days last week, the Department of Homeland Security said. Immigration and Customs Enforcement agents have been deployed to some major airports.

The shutdown persists as Republicans and Democrats are at loggerheads over funding for the DHS. Republicans want to allocate billions more to ICE, but Democrats want it to be reformed in the wake of January's violence in Minnesota.

Here are the airlines that are offering waivers:

Delta Air Lines

In a travel advisory, Delta said that travel from its main hub, Atlanta's Hartsfield-Jackson International, "may be affected" by longer security wait times. The airport is advising passengers to allow at least 4 hours for domestic and international screenings.

Delta customers flying from Atlanta on Monday or Tuesday can rebook to travel on or before March 30, and the fare difference will be waived.

Within a year of the ticket being issued, passengers could rebook without a change fee but would still need to pay the fare difference. Or, they could apply any unused value of the ticket toward the purchase of a new one.

A Delta spokesperson said this only applies for people on flights originating from Atlanta, not connecting through the hub.

United Airlines

United issued an alert for Houston's George Bush Intercontinental Airport, saying travel "may be affected."

Tickets purchased on or before Sunday, for travel on Monday or Tuesday, can be rescheduled for a United flight until March 31. "Tickets must be in the same cabin and between the same cities as originally booked."

The airline didn't immediately respond to a request for comment on whether this was directly related to TSA staffing shortages. A banner on the airport's website on Tuesday said security wait times could exceed 4 hours.

Allegiant Air

Allegiant announced a "travel with confidence" policy that allows customers with new and existing tickets through the end of the partial government shutdown to change or cancel their flights at no extra charge.

This includes "no change fees for eligible bookings" and the "option to cancel and receive a refund without penalty."

JetBlue

"With the exception of Blue Basic, all JetBlue fares are flexible — meaning no change or cancellation fees for customers who want to adjust their travel plans ahead of time," an airline spokesperson told Business Insider.

Customers who miss their flight due to long security lines will be rebooked on the next available flight, they added.

JetBlue advises customers to arrive earlier than normal, and said that it's working closely with TSA and continues to monitor the situation.

Southwest

Southwest said it is rebooking passengers who miss their flights due to long TSA lines at no cost.

The airline added that customers are also being offered change waivers and that it's "accepting checked bags well in advance of scheduled flights."

• Delays persist at TSA checkpoints across US airports due to the partial government shutdown.
• As of Monday morning, Hartsfield-Jackson Atlanta Airport is advising travelers to show up 4 hours early.
• Here's the latest on TSA delays, and how to check wait times before you travel.

If you're flying in the US, get ready to stand in line.

Airports across the US are continuing to see lengthy waits at security checkpoints as scores of TSA workers call out due to missed paychecks.

A partial government shutdown has left the Department of Homeland Security and its Transportation Security Administration unfunded and their agents unpaid at the height of the spring break travel season.

As many as 10% of all TSA agents called out on several days last week, DHS updates showed, with absence rates averaging as much as 20% in some airports. A DHS spokesperson told Business Insider that some airports, such as William P. Hobby Airport in Houston, had seen absence rates as high at 40.8%.

Security lines in affected airports are spiking unpredictably from day to day, and sometimes even from hour to hour.

"The current unpredictability is being driven by unpredictable staffing levels, basically, how many TSA officers are showing up for work on any given day," Sheldon H. Jacobson, the founder professor of engineering at the University of Illinois Urbana-Champaign and an expert on aviation security and airport security screening, told Business Insider.

"TSA officers have historically been cross-trained to do many different tasks, so the number that show up is the key factor," Jacobson said.

How long are the TSA delays?

Delays at TSA checkpoints across the US have been unpredictable, and some airports are changing how they're communicating with travelers.

As of Monday morning, Hartsfield-Jackson Atlanta International Airport, the world's busiest by passenger numbers, now displays the following message on its website: "Due to current federal conditions, passengers are advised to allow at least 4 hours or more for domestic and international screenings."

Atlanta has been among the worst-affected airports since the shutdown began, with over a third of TSA staff not showing up on some days.

The airport said there had been congestion at the international checkpoint as domestic travelers try to bypass long lines in the domestic terminal. The airport said domestic travelers should use the domestic checkpoints.

At Houston's George Bush Intercontinental Airport, lines stretched over three hours on Sunday evening. As of Monday morning, the average wait time is 28 minutes.

Lines at checkpoints at JFK, the New York area's biggest airport, are running at 45 minutes on Monday.

JFK said it has "deployed additional customer care staff into terminals to help manage queues, assist passengers, and keep people moving as efficiently as possible."

As of Monday, Newark Liberty International Airport displays a message on its website that says security wait times may be "significantly longer than normal."

"Please allow for significantly more time and check with your airline for the current status of your flight," the message says.

Separate from TSA issues, LaGuardia Airport was closed early Monday after a plane collided with a vehicle. It will remain closed until at least 2 p.m. ET.

Denver, home of the fourth-busiest airport in the US, is experiencing wait times of 45 minutes on Monday. Dallas-Fort Worth lines are at 46 minutes.

At Los Angeles International Airport, the nation's fifth-busiest travel hub, waits were listed as "0" minutes.

Some airports have so far avoided the hourslong lines. Business Insider's Taylor Rains flew out of Las Vegas last week and saw minimal TSA lines.

The maximum wait time at Philadelphia International Airport was listed as 30 minutes on Monday, although some terminals were quicker.

How to check TSA wait times

The unpredictable delays mean travelers should plan for long waits even if their airport hasn't yet experienced problems.

The easiest way to avoid the stress of missing your flight is to give yourself extra time in the airport. Many airports are advising travelers this week to arrive up to three hours before their flight, even for domestic flights.

Many airports, including major hubs like Atlanta, Houston, JFK, Newark, Philadelphia, Dallas-Fort Worth, and Denver, have been posting TSA wait times live on their websites.

These can also provide more specific insights. For example, DFW's website shows the wait times at each checkpoint.

You can also use the MyTSA mobile app. It provides estimated wait times in 15-minute intervals based on average checkpoint data. The app, however, will use historical data if the live data cannot be retrieved. The TSA also says it is not "actively" managing its sites during the partial shutdown, and so the app may not always be updated.

How long will the TSA delays persist?

Transportation Secretary Sean Duffy said airport delays could get worse.

"As we get into next week and they're about to miss another payment, this is going to look like child's play, what's happening right now," Duffy said on CNBC.

Some airports could be forced to close, both Duffy and Adam Stahl, the TSA's acting deputy administrator, said.

Airports like Denver and Seattle have asked the public for food, gift cards, and basic supplies to support TSA staff working without pay.

• Southwest Airlines will no longer serve Chicago O'Hare and Washington Dulles starting June 4.
• It will still fly from Chicago Midway, Baltimore/Washington International, and Reagan National.
• Midway and Baltimore are Southwest hubs, but it has a small presence at O'Hare and Dulles.

Southwest Airlines is retreating to its strongholds.

It announced late last week that it will no longer fly from Chicago O'Hare and Washington Dulles Airports starting June 4.

The move is part of its "ongoing efforts to refine its network," it added.

However, it said there won't be any "significant changes" to flight availability from the cities because it's still operating at other nearby airports: Chicago Midway (MDW), Baltimore/Washington International (BWI), and Washington Reagan National (DCA).

O'Hare and Dulles are both popular international airports, ranked third and 22nd in the US, respectively, by passenger numbers. That heightened competition drives up operating costs and gate fees, which isn't ideal for a budget carrier like Southwest.

Meanwhile, Midway is a major hub for Southwest. It carries over 90% of passengers there, according to the Bureau of Transportation Statistics.

Data from the aviation analytics firm Cirium shows over 6,000 Southwest flights scheduled from there this month. That's more than 13 times as many as from O'Hare.

"We are confident we can serve Chicagoland from our long-standing base at Midway, where we will continue to offer service to more than 80 destinations, including the 15 markets we serve from O'Hare," the airline said.

It comes as United Airlines and American Airlines are fighting for dominance at O'Hare. The former is increasing its flight schedule and working to acquire two gates from Spirit Airlines' bankruptcy proceedings.

Southwest said that operating from O'Hare "continues to be challenging." It only started flights there in 2021.

In and around the nation's capital, the airline is similarly exiting an airport where it has a weaker presence.

Cirium data shows just 93 Southwest flights scheduled from Dulles this month: Twice daily to Denver, and once a day to Phoenix.

United Airlines is the main player there with a majority of the market share.

Meanwhile, Southwest operates nearly three-quarters of flights from Baltimore. It's the second-biggest airline at Reagan National, behind American on 27%, according to the Bureau of Transportation Statistics.

Southwest said it is "the largest carrier in the Washington area in terms of passengers carried."

It will offer up to 271 departures to 79 nonstop destinations from DCA and BWI, it added.

Frontline employees at O'Hare and Dulles will be able to bid for positions at other airports where Southwest operates, the airline said.

• War in the Middle East has pushed fuel costs, and therefore airfares, sharply higher.
• Business Insider charted the increase in ticket prices for three major flight paths in recent weeks.
• Fares from New York to LA, New York to London, and from the US mainland to the Caribbean have jumped.

Your next flight could be twice as expensive because the Iran war is causing volatility in oil prices.

Brent crude is up more than 50% over the past month, to around $101 a barrel. Jet fuel costs are rising faster. The Argus US Jet Fuel Index is up 72% over the same period.

That spells difficulty for airlines because jet fuel is typically their biggest expense after labor. While many airlines around the world hedge against fuel costs, most American ones do not.

Using data from Deutsche Bank, Business Insider charted rising airfares in three major markets.

The data looks at the lowest available published fares 21 days in advance of the flights. The published fare doesn't necessarily mean a ticket has been purchased for that amount, the Deutsche Bank research analysts said.

Cross-country flights, often known in the industry as transcontinental flights, have seen the biggest week-over-week spike — more than double, on average.

New York to Los Angeles is the country's busiest domestic route, with a capacity of 3.4 million seats out of JFK Airport last year, according to OAG data.

The average price of a transcontinental flight has risen from $167 to $414, Deutsche Bank's analysis showed. In the past week, the average has spiked 107%.

United Airlines is offering flights from Washington Dulles Airport to San Francisco for $502, up from $149 a month ago.

International business travellers are also seeing flight prices rise.

New York to London is the country's most popular international route, and the 10th-busiest in the world. Nearly 4 million seats were scheduled on flights between JFK and Heathrow last year, per OAG.

While the average Transatlantic flight is some 40% more expensive than a month ago, there are bigger rises for the New York-London route. However, it also appears more volatile here with a big dip last week.

Delta Air Lines' service is up from $285 to $553 over the past month, while United's is up to $846. That's a 177% rise compared to a week earlier, according to Deutsche Bank's analysis.

There's bad news for vacationers, too.

Flights to the Caribbean on March 27 are up 58% on average compared to a week before.

JetBlue's flight from New York to Santo Domingo, Dominican Republic, has risen from $165 to $566 on March 27.

Compared to a year earlier, that's a more than fourfold rise, Deutsche Bank found.

Southwest Airlines' flight from Baltimore to Montego Bay, Jamaica, has more than doubled over the past week. And Alaska Airlines' service from Los Angeles to San Jose, Costa Rica, is up 40% compared to a week earlier or 120% versus a year ago.

• Airport security checkpoints in the US are under pressure due to the partial government shutdown.
• Many now-unpaid TSA agents are skipping work or even quitting, causing long lines and wait times.
• Here's the latest on TSA delays, and how to check wait times before you travel.

If there's anything that can bring Americans together to demand government action, it's long lines at airport security.

Those lines persisted at airports across the US this week as a partial government shutdown left the Department of Homeland Security and its Transportation Security Administration unfunded and their agents unpaid at the height of the spring break travel season.

Airports are now telling passengers to arrive up to three hours early to clear security in time for their flights.

The TSA on Sunday called on Congress to resolve the impasse over the immigration enforcement policies that have left the DHS unfunded for a month. The agency said hundreds of unpaid agents have quit.

"3+ hour TSA lines for travelers. 300+ TSA officers who have quit. A $0 paycheck for those continuing to serve. Enough is enough," the agency said in an X post on Saturday.

A group of airline CEOs also sent a letter to Congress on Saturday calling on Republicans and Democrats to figure it out. "Americans —who live in your districts and home states — are tired of long lines at airports, travel delays, and flight cancellations caused by shutdown after shutdown," the letter, which was signed by the CEOs of Delta, United, American, JetBlue, and others, says.

By early Tuesday morning, lengthy lines were still present at several airports, though they had calmed at some locations that had seen long lines over the weekend.

Hartsfield-Jackson Atlanta International Airport, the world's busiest by passenger numbers, had lines as long as 90 minutes at some domestic security checkpoints early on Tuesday morning, having seen waits of up to 2 hours over the weekend.

In a Monday X post, the airport encouraged travelers to allow extra time for screening and to arrive at least 3 hours before their flight. Many flights also faced lengthy delays or cancellations due to a major storm.

Lines at some checkpoints in the New York area's two biggest airports, JFK and Newark, were both around 30 minutes long early Tuesday.

At Dallas-Fort Worth, waits varied by checkpoint, ranging from over 20 minutes to as short as 2 minutes.

Austin-Bergstrom International was one of the worst-affected airports over the weekend, due in part to an influx of travelers for the SXSW festival.

The airport's social media channels are posting frequent updates about how busy TSA lines are, showing long lines in the terminal building on Tuesday morning.

While busy, Austin appeared to have calmed down compared to the end of last week and the weekend. Photos and videos shared by travelers over the weekend showed lines stretching from the terminal building into the parking lot.

To ensure passengers clear security in plenty of time, many airports are telling passengers to leave longer than usual to get through. Dallas-Fort Worth Airport told travelers to allow at least 2 hours for domestic flights, while Austin advised leaving 2.5 to 3 hours.

How to check wait times

The easiest way to avoid the stress of missing your flight is to arrive as early as you can. Many airports are advising travelers this week to arrive up to three hours before their flight.

To check TSA wait times, many airports, including major hubs like Atlanta, Houston, JFK, Newark, Philadelphia, Dallas-Fort Worth, and Denver, post them live on their websites.

These can also provide more specific insights. For example, DFW's website shows the wait times at each checkpoint.

While broadly reliable, some airport websites aren't always accurate. On Monday, Atlanta Airport said the feature was "currently unavailable due to a technical issue," although it was later fixed.

You can also use the MyTSA mobile app. It provides estimated wait times in 15-minute intervals based on average checkpoint data. The app, however, will use historical data if the live data cannot be retrieved. The TSA also says it is not "actively" managing its sites during the partial shutdown, and so the app may not always be updated.