TSA vs CATSA: The Rules That Change at the Border
The liquids rule is identical — bowling balls, powder caps, eye drops, pepper spray and cannabis are not. Every verified divergence in one table.
On this page · 4 sections
How do TSA and CATSA checkpoint regulations diverge in practice?
While 3-1-1 liquids rules are harmonized, key differences exist: Canada bans all defense sprays, limits carry-on scissor blades to 6 cm (vs US 4 inches), and enforces strict powder volume screening rules (max 350 ml / 12 oz).
What are the critical cross-border cannabis legal rules?
Transporting legal recreational cannabis is permitted on domestic flights within Canada (up to 30 grams), but crossing the international border with cannabis in either direction is a severe federal criminal offense.
TSA vs CATSA Checkpoint Regulation Comparison Table
Review the primary rule variations between American and Canadian screening:
| Item / Topic | TSA (United States) | CATSA (Canada) |
|---|---|---|
| Scissor Blade Limit | ≤ 4 inches (10.1 cm) | ≤ 6 cm (2.36 inches) |
| Pepper Spray in Checked Bag | Allowed (1 container <4 oz) | Strictly Banned |
| Domestic Cannabis | Federal ban (TSA refers to police) | Allowed (≤ 30g legal limit) |
| Powder Checkpoint Limit | Separate screening >12 oz (350 ml) | Strict ban on inorganic powder >350ml |
よくある質問 (FAQ)
Frequently asked questions
Is pepper spray allowed on domestic flights in Canada?
No. CATSA strictly bans self-defense pepper spray in both carry-on and checked baggage, whereas TSA permits one 4 oz container with safety lock in checked luggage.