Travel US borders with Canada, Mexico to remain closed through Oct. 21 to ‘slow spread of COVID-19’ September 19, 2020Jayme Deerwester, USA TODAYComments Off on US borders with Canada, Mexico to remain closed through Oct. 21 to ‘slow spread of COVID-19’ Neither border closure extension comes as much of a surprise: The U.S., Canada and Mexico have all seen a rise in cases since August.