How much postage is necessary to mail a letter from California British Columbia Canada?

To mail a letter from California to British Columbia, Canada, the postage required depends on the weight and size of the letter. Assuming a standard-sized letter (up to 1 ounce) and using USPS First-Class International Mail service, the postage rate as of January 2023 is:

- $1.40 for a letter weighing up to 1 ounce (28 grams).

- For letters weighing over 1 ounce, additional postage will be required based on the weight.

It's important to note that these rates are subject to change, so it's always best to verify the current postage rates with the United States Postal Service (USPS) or your preferred shipping carrier.