If you're flying in the next couple of days, you might want to show up at the airport a few hours earlier than planned.
Security is being amped up at airports in both Canada and the United States following a Christmas Day attempt to blow up a flight that was landing in Detroit.
Air Canada and WestJet are advising passengers on flights heading to the US to expect delays due to added security screening. They say carry-on baggage will be limited to one item.
WestJet says that, until at least Wednesday, all passangers must submit to a pat down search and their carry-on luggage will be searched by hand.
The airliners recommend that passengers show up at least three hours before their flight.