The TSA screened more than 1 million passengers on Sunday, the first time it has reached that threshold since March 17.
For the week that ended Sunday, the agency screened 6.1 million passengers, also the highest volume since the start of Covid-19 pandemic.
Related: TSA implementing virus-related procedures
Still, the TSA throughput for the week was just 35.6% of last year's level. Prior to March 17, the agency had screened less than 1 million people just once since May 2004. That came on Feb. 1, 2011, when a blizzard caused more than 6,000 flight cancellations in North America.