Labour’s David Lammy, Liberal Democrat Sir Norman Lamb and Tory Jonathan Djanogly travelled to Canada on the trip organised by UK pro-legalisation group Volte Face.
Canada legalised cannabis last year, whereas the UK only allows for the drug to be prescribed for medicinal purposes.
As a result of the trip, Sir Norman and Mr Lammy have predicted the drug will be fully legalised in Britain within five years.
Tottenham MP Mr Lammy said: “I want the market legalised, regulated and taken away from crime gangs.
“I want to see the strength of the stuff reduced, labelled and properly organised in this country”
“I want to see the strength of the stuff reduced, labelled and properly organised in this country.”
Sir Norman had led the Lib Dems to back the legalisation of the drug, and wrote about how our “current laws on cannabis are not working,” in the Evening Standard.
Meanwhile, Mr Djanogly told BBC Newsbeat: “I think we have got a lot to learn before before the legalisation of recreational cannabis.”
Mr Djanogly added he thought legalisation would occur, but at some point in the next 10 to 15 years.
Earlier this month, a poll revealed 63% of Londoners would back the legalisation of the class B drug.
The poll, carried out by Survation, highlights a dramatic change from the evenly split public opinion poll carried out by YouGov last summer.
Cannabis is the UK’s most widely used illicit drug with an estimated three million users.
In the US, 10 states have legalised cannabis for recreational use, starting with Colorado and Washington in 2012, and New York, New Jersey and Illinois.