Canceled, delayed flights are likely over July 4 holiday weekend. What to know about your rights

Over 2.8 million travelers are expected to pass through airport security checkpoints on Friday — a single-day record, according to the Transportation Security Administration.

The TSA is prepared for “sustained higher passenger volumes” throughout the summer, with June 29 through July 5 being the busiest period.

This comes as severe storms and staffing shortages have already derailed thousands of flights this week. Storms are forecast across swaths of the U.S. heading into the weekend.

A technology issue may also snarl air travel this weekend. Starting Saturday, wireless carriers will be allowed to boost their 5G signal power, and planes that aren’t retrofitted with certain equipment to prevent interference from such transmissions won’t be allowed to land when visibility is poor, as during bad weather, said Transportation Secretary Pete Buttigieg.

“It’s a whole mix of factors,” said Kimberly Palmer, personal finance expert at NerdWallet. “We do expect to see a lot of delays, unfortunately.”

“You don’t have to accept a rebooking, voucher or anything,” Murray said. “They have to give you a refund if that’s what you want.”

Of course, that policy doesn’t necessarily help defray other incurred costs, such as food and lodging, or help travelers who would rather continue to their destination instead of accept a refund.

Here, airlines have some discretion to dole out money — especially if a delay or cancellation is their fault and not due to something beyond their control, such as bad weather.

“There’s no reason not to ask,” Palmer said.

The U.S. Department of Transportation’s Airline Customer Service Dashboard outlines passenger rights for specific airlines. The list outlines commitments made by the 10 largest carriers in the event of “controllable” cancellations and delays.

“These aren’t suggestions,” Murray said of the commitments. “It’s binding.”

For example: All major carriers will rebook passengers on the same airline at no additional cost for “significant” delays and will cover meals if there’s a delay of three hours or more. Some will rebook on a partner airline at no additional cost.

All major airlines — except for Frontier — will cover a hotel stay and transportation to the hotel in the event of an overnight cancellation. Six of 10 will rebook on another airline at no extra cost. Just two airlines offer credits or travel vouchers if a cancellation causes a wait of at least three hours.

Even if a delay isn’t their fault, many airlines will transfer your ticket to another airline’s flight with available seats at no additional cost — if you ask, according to the U.S. PIRG Education Fund.

Of course, none of these options help travelers who, in the face of a flight disruption, opt for another mode of transit, such as a rental car, Palmer said.

“I think this is a really common situation for people” that could come with “a lot of extra costs,” she said.