As of today – Monday, November 27, 2017 – small knives with blades of up to 6 cm will be permitted as carry-on luggage on domestic and most international flights, with the exception of flights to and from the United States.
To respect Canada’s security screening agreement with the United States, knife blades of any length will remain prohibited on flights to the United States through preclearance facilities. Razor blades and box cutters of any size will remain prohibited at all screening checkpoints.
The revised rules from Transport Canada also lift a ban on certain powders and granular material above 350 millilitres – about the size of a pop can. However, prohibited material includes items such as bath salts, sea salt, baby powder, foot powder, cooking powder and sand.
Items such as baby formula, protein powder, tea and coffee will still be permitted in any quantity.
The updated security regulations were announced by Transport Canada earlier this month.