Flights will be affected even after the government reopens. Here’s what travelers need to know.

A new bill emerged in the US Senate on Sunday to reopen the government and end the shutdown, now the longest in US history. The funding bill now needs formal approval in the Senate and a vote in the House, before it would go to President Trump for his signature.

However, even with a final resolution in the works, many Americans will continue feeling the brunt of this shutdown, especially travelers.

Over the weekend, more than 20,000 flights were delayed and cancelled across the US, with thousands more piling up on Monday. Those disruptions are likely to continue in the short term, even after the government is up and running again.

Since the start of the shutdown, air traffic controllers and TSA agents have been working without pay, resulting in staffing shortages at airports that have led to the spike in flight delays and cancellations.

In an effort to ease the strain on airports, the FAA announced a temporary 10% reduction in flights at 40 high-traffic airports across the country. A 4% reduction went into effect on Friday, with additional cuts planned for the coming days, increasing to 6% by Nov. 11, 8% by Nov. 13, and 10% by Nov. 14.

“We are seeing signs of stress in the system, so we are proactively reducing the number of flights to make sure the American people continue to fly safely,” said Federal Aviation Administrator Bryan Bedford in a statement.

While this move aimed to alleviate the mounting pressure on understaffed airlines and airports, travelers have found themselves all packed up with nowhere to go.

Many airlines, including American Airlines, JetBlue, Delta, and United Airlines, are issuing travel waivers that allow passengers to change or cancel their flights for a full refund, without penalty.

Even once lawmakers officially reopen the government, the shutdown could have lasting effects on the travel industry.

The US already has a growing shortage of air traffic controllers. In an interview with CNN, US Transportation Secretary Sean Duffy said that before the shutdown, there were about four air traffic controllers retiring each day; now that figure has shot up to 15 or 20 per day.

Some airline pilots are taking matters into their own hands and reassuring nervous travelers that these air traffic controller shortages do not equate to unsafe travel conditions.

“The challenge is getting the controllers paid and getting them back on the job right away,” said George Ferguson, Bloomberg Intelligence Analyst, in an interview with Yahoo Finance.

Air traffic controllers often work mandatory overtime thanks to the shortage in their ranks. The shutdown and unpaid work have only added to their burden.

“If this drags on, I think the controllers are at this point where they’ve missed enough paychecks, where some of them will not be willing to pick up additional shifts, and that creates problems in air traffic control systems,” Ferguson said. “I don’t think they’re going to shirk their duties and not show up for work entirely, but again, those extra shifts, I think, help keep things going in the US airspace, and I think then you’re going to start to have more effect on operations as you roll to Thanksgiving, which is a big peak crunch travel time.”

Ferguson said many travelers have likely already booked their Thanksgiving travel plans. For those travelers, it will be essential to keep tabs on real-time data to know if their plans will be impacted and how. Websites such as FlightAware, FlightRadar24, and the National Airspace System Status provide real-time updates on air traffic, flight delays, and cancellations nationwide.

If you haven’t booked your Thanksgiving travel yet, it could be worth considering alternative options, such as train and bus routes, traveling by car, or budgeting for extra time off work to account for potential delays.

Standard travel insurance policies may not offer any protection during a government shutdown, as these policies typically categorize a government shutdown as a “known event.” However, some travel insurance policies offer additional coverage known as “Cancel For Any Reason” or “Interrupt for Any Reason” coverage, which provides more flexibility and covers cancellations beyond what a base policy covers.

Even though policies do not typically reimburse you directly for a shutdown, they may cover some of the indirect losses brought on by a shutdown — for example, if your flight is delayed due to staffing shortages and you need to book an overnight stay at a hotel.

“Travel insurance can help in many ways, from coverage for delays to cash payments for cancelled flights,” says Jeff Rolander, vice president of Claims at Faye, a digital travel insurance provider.

“Policies with Cancel For Any Reason coverage offer the most flexibility — a customer can get 75% of their trip cost refunded, even if they decide just not to go. It’s important though, to buy your policy before an event like this occurs — many policies purchased now will not cover the current situation.”

You may also qualify for travel insurance at no additional cost if you book with a credit card that offers travel coverage as a free perk for cardholders. For example, the Chase Sapphire Preferred® Card provides these benefits:

• Auto rental coverage

• Baggage delay insurance

• Lost luggage reimbursement

• Roadside assistance

• Travel accident insurance

• Travel and emergency assistance

• Trip cancellation and interruption insurance

• Trip delay reimbursement

If you’re still contemplating booking Thanksgiving or other holiday travel, it may be worth reviewing your credit card protections or tacking on a travel insurance policy for added security while you wait to see what happens next.

Read more: How does business travel insurance work?