It depends on the weight. The distance is calculated in as well, but an average 2 page letter to Canda is about $1.08.
Calculate your letter here at United States Postal Service: http://ircalc.usps.gov/MailServices.aspx?country=12000&m=1&p=0&o=2
it takes a mounth to send a letter from brazil to canada
According to Canada Post's site, which I just looked up, it is $0.52.
At the current time, March 2013, it costs €0.82 to send a normal letter from Ireland to Canada.
72 cents
it will most likely take 3.70
98 Canadian cents.
it cost 1.00 to
As of 2016, it costs $1.15.
54 cents, if the letter is mailed from one place in Canada to another
You send it to an airport that will port the letter to Canada
It depends where you are sending it from, like the U.S., Canada, China, Japan, Asia, etc.