Personal oxygen concentrators (POCs): In order to have a POC screened, passengers may choose to either: 1) bring a clear plastic bag to place the respiratory device into for screening or 2) leave the attachments (tubes and mask) inside the case and place the main electronic unit only in a bin.
CATSA encourages all passengers to arrive at their departing airport well in advance of their flight. Many airlines advise passengers to arrive two hours in advance for domestic flights and three hours in advance for US and international flights.