Disgruntled travelers across the US will face more disruptions to their plans this weekend, as airlines cancel hundreds of additional flights and delays continue to mount due to air traffic controller staffing shortages amid a government shutdown with no end in sight.

More than 1,700 flights have been canceled from Friday through Sunday, data from Cirium shows, as airlines start to implement a 4% reduction in domestic flights at 40 of the busiest airports mandated by the Federal Aviation Administration.

But the cuts – which officials say are aimed at keeping air travel safe while some of the air traffic controllers and federal security screeners missing paychecks are not showing up to work – haven’t prevented thousands of hourslong delays that have left flyers scrambling to figure out how to get to their destinations.

“I just don’t want to be stranded at the airport sleeping on a bench,” Michele Cuthbert of Columbus, Ohio, told the Associated Press, expressing concern about possible flight cancellations ahead of her trip to Dallas.

Over the next week, airlines will ramp up flight cancellations to 10% by next Friday if the government shutdown remains unsolved. But travelers can still see flight cuts even if the government were to reopen next week, as the FAA’s order requires airlines to cancel flights days in advance.

Here’s what to know if you plan to travel by air in the coming days:

An emergency order by the FAA on Thursday said airlines have to cut traffic by 4%, resulting in about 800 flight cancellations for Friday that increased to over 1,000 throughout the day, according to FlightAware.

The disruptions are primarily caused by air traffic controller staffing and the FAA order, but also include unrelated flight cuts.

Airlines will be required to cut 6% of their flights to those 40 airports on Tuesday, 8% Thursday and 10% next Friday if the shutdown drags on, the FAA says.

That percentage could rise to 15-20% if the gridlock in Congress doesn’t end “relatively soon,” Transportation Secretary Sean Duffy warned in an interview with Fox News.