Effective November 27, 2017, Transport Canada has amended the Prohibited Items List for passengers on all domestic and international flights. This includes prohibiting certain powders and granular material with a volume over 350 ml in all carry-on baggage in Canada. Consistent with international practice, Transport Canada will also amend the list so that very small knife blades (6 cm or less—about the size of a large paper clip) will not be prohibited on domestic or international flights. Knife blades of any length will remain prohibited on flights to the United States through preclearance facilities.
Please make sure to check The Canadian Air Transport Security Authority (CATSA) website for a comprehensive list of what you can/cannot bring on a flight: www.catsa.gc.ca/whatcanIbring.