It costs 72 cents to mail an ordinary letter under half an ounce to Canada from the USA.
96 cents.
This depends on where you are mailing the letter from, and the dimensions and weight of the letter.
96 cents
what is the required postage from california to canada for a letter?
To mail a single letter to Canada, the stamp must be equivalent to the postage cost. As long as the stamp is equal to the postage, any letter can be sent with any kind of postage stamp.
The amount of postage to mail a letter to Ontario, Canada varies greatly based on the origin of the letter and its weight. A letter sent inside Ontario will typically cost around 85 cents.
21p
Domestic postage for a standard letter is now .57 each, .60 with tax. These stamps do not have the rate on them, and never expire. This change was done as of Jan 11, 2010.
Postage to Europe from the US is 98 cents for a one-ounce letter.
44 cents
See: USPO website.
International lettermail from the US to Canada is $0.80 through USPS.