坐飞机可以带 大麻与四氢大麻酚制品 (THC) 吗？（美国TSA/加拿大CATSA标准）

有限制允许：须严格符合民航安全规范与限量要求方可随身携带。

允许托运：须符合民航关于托运数量、包装及防护要求的相关规定。

Standard carry-on baggage size allowances apply; TSA publishes no individual numerical cap for personal use.

TSA officers do not search for drugs and are not police — but if screening turns it up, protocol is to refer you to local law enforcement. In airports inside prohibition states, that referral is the real risk.

Yes, on domestic Canadian flights within the adult public-possession limit — keep liquid or topical cannabis in the 1 L liquids bag. Never depart Canada (or return) with any amount: crossing the Canadian border with cannabis is a criminal offence, medical use included.

In the US, cannabis and THC gummies containing more than 0.3% THC are federally prohibited under 21 U.S.C. § 802. TSA does not actively search for drugs, but if detected during checked bag screening, officers must notify law enforcement. In Canada, domestic passengers may carry up to 30 grams of legal recreational cannabis in checked or carry-on bags, but crossing international borders remains strictly illegal.