U.S. travelers are being reminded that carrying cannabis products across international borders remains illegal in many nations, a warning underscored by Thailand's recent increase in penalties for such offenses. As of June 2026, individuals caught bringing cannabis into Thailand face potential consequences of up to 10 years in prison, a fine of up to 500,000 Thai baht (approximately $15,000), or both, according to the U.S. Embassy and Consulate in Thailand.
Despite Thailand's decriminalization of cannabis possession in 2022, the import and export of cannabis without explicit permission are still prohibited. This policy shift highlights a broader international landscape where cannabis laws are often strictly enforced.
"When you travel to a different jurisdiction, you become subject to its laws," said Jeffrey Hoffman, a New York-based cannabis attorney. He emphasized that travelers should not assume that laws in their home country or U.S. states apply once they cross an international border. "There is no safe harbor when traveling internationally. Even a mistake is no excuse."
Legal experts point to high-profile cases, such as that of WNBA star Brittney Griner, who faced imprisonment in Russia after cannabis oil was found in her luggage, as a stark reminder of the severe penalties some countries impose on drug offenses. Travel expert Bobby Laurie advised travelers to thoroughly research local laws before each trip and to meticulously check luggage for any forgotten items.
"Many travelers mistakenly assume that if something is legal at home, it’s automatically legal everywhere they go," Laurie noted. "Even if you’re carrying a cannabis product for personal use or have a medical prescription, that doesn’t guarantee it [will] be allowed at your destination."
This advisory extends beyond Thailand, as many countries maintain stringent regulations on substances that may be legal in the United States or Canada. The Transportation Security Administration (TSA) also notes that while its officers primarily focus on security screening, they may report suspected violations of law to local law enforcement. Crossing international borders with cannabis is governed by the destination country's laws, irrespective of its legality in the traveler's home country.