In this July 1, 2021, file photo, people walk through Salt Lake City International Airport in Salt Lake City. (AP Photo / Rick Bowmer, File)

AAA forecasts that more than 47 million people will travel by car or plane this weekend in the U.S., a return to 2019 levels and 40% higher than last year. That includes 3.5 million airline passengers.

A passenger waits in line at O’Hare International Airport on Wednesday, April 29, 2020. (WTTW News)

More than 1 million travelers are projected to pass through O’Hare and Midway airports over Memorial Day weekend, and the Department of Aviation wants people to know that masks are required.

In this Nov. 25, 2020, file photo, air travelers line up to go through a a security checkpoint at Salt Lake City International Airport in Salt Lake City. (AP Photo / Rick Bowmer, File)

Travelers on airplanes and public transportation like buses and subways will be required to wear face masks starting next week to curb the spread of COVID-19.