The first ounce of postage costs 85 cents, a two-ounce letter costs $1.17 and a three-ounce letter costs $1.49.
The price of postage for a one-ounce ordinary size non-rigid first class letter to Canada is 75 cents. First-Class Mail® International Letter. Maximum Value for Contents: $400.00. 22.1k Views. A letter can be sent to Canada from the U.S. using International First-Class Mail for as low as $0.80 (as long as the weight of the letter is not over 1 ounce). Exact rates based on weight (and for destinations other than Canada) can be found at the USPS website: http://www.usps.com/price s/first... As of 2013, it costs $1.10 to mail a letter (up to 1 ounce, or  about 28 g) to Canada from the US.    Rates differ depending on the size of mail and other mailing  op … tions. See the United States Postal Service website for more  details. The cost of mailing a first-class letter within Canada went up to 85 cents today — a 35 per cent jump from the 63 cents it cost yesterday. But the 85-cent rate is only available if stamps are purchased in a pack. If you want to buy just one stamp, it will cost $1. Step 3. Calculate your postage rate using the international postage price calculator. For a first-class letter to Canada, the first ounce of postage costs 85 cents, a two-ounce letter costs $1.17 and a three-ounce letter costs $1.49, as of the time of publication.
http://www.answers.com/Q/How_much_does_it_cost_to_mail_a_letter_to_Canada_from_the_US https://www.quora.com/How-much-postage-do-I-need-to-put-on-a-regular-letter-sent-from-the-U-S-to-Canada http://www.answers.com/Q/How_much_does_it_cost_to_mail_a_letter_to_Canada_from_the_US http://www.cbc.ca/news/business/cost-to-mail-a-letter-soars-35-1.2592565 http://smallbusiness.chron.com/calculate-postage-us-canada-39516.html
cost of mailing letter to canada