The Fourth of July holiday weekend is off to a booming start with airport crowds crushing the numbers seen in 2019, before the pandemic.

Travelers seemed to be experiencing fewer delays and canceled flights early Friday than they did earlier this week.

The Transportation Security Administration screened more than 2.4 million travelers at airport checkpoints on Thursday, 17% more than on the same Friday before July Fourth in 2019.

'We expect that (Friday) is going to be busy, of course, and then Sunday will be very busy,' TSA Administrator David Pekoske said on NBC's 'Today' show.

AAA predicts that nearly 48 million people will travel at least 50 miles or more from home over the weekend, slightly fewer than in 2019. AAA says car travel will set a record even with the national average price for gasoline hovering near $5.

Leisure travel has bounced back this year, offsetting weakness in business travel and international flying. Still, the total number of people flying has not recovered to pre-pandemic levels. TSA screened 11% fewer people in June than it did in the same month of 2019.

Thursday marked the 11th time since the pandemic started that TSA checked more people than it did on the same day in 2019, and just the second time since February.

Airlines could almost surely be carrying more passengers if they had enough staffing.

Many U.S. airlines have trimmed their summer schedules after bad weather, air-traffic delays and a lack of enough employees caused widespread cancellations over the Memorial Day weekend.

Airline executives blame their flight problems on the Federal Aviation Administration, which runs the nation's air traffic control system, but Transportation Secretary Pete Buttigieg disputes that claim.

By late morning Friday on the East Coast, airlines had canceled about 200 U.S. flights and another 1,400 were delayed. From June 22 through Wednesday at least 600 flights were canceled, and between 4,000 and 7,000 were delayed per day, according to tracking service FlightAware.