Marijuana is legal in Canada for both recreational and medicinal purposes and in some U.S. states, but carrying cannabis internationally is still a big no-no.

Two 20-year-old Canadians found that out when they were arrested leaving the Toronto airport, allegedly carrying almost 18 kilograms (about 40 pounds) of pot.

The travelers are being charged with attempting to smuggle about $100,000 worth of marijuana to Miami, Florida in their checked luggage. 

Florida does not allow for the use or sale of marijuana, except when prescribed by a medical doctor to treat certain conditions. 

Even if marijuana were legal at the plane's destination, Canadian law still won’t allow anyone to transport the drug over its borders, while U.S. federal law still lists marijuana as illegal.

People in Canada can carry up to 30 grams of marijuana without any fear of reprisal from the law.