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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.

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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.

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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.