How much to mail a letter from the USA Curitiba Brazil?

Regular Airmail (First-Class Letter):

- Standard Letter (up to 1 ounce/28 grams): $1.40

- Additional ounce (after the first ounce): $1.00

Express Delivery:

- Priority Mail Express International Flat Rate Envelope (up to 4 pounds/1.8 kilograms): $59.95

- Priority Mail Express International Flat Rate Box (up to 20 pounds/9 kilograms): $74.95

Registered Mail:

- Registered Letter (up to 1 pound/454 grams): $22.95

- Each Additional pound: $1.85

Note: These rates may vary depending on fluctuations in postal rates. Please check with the United States Postal Service (USPS) website or your local post office for the most current and accurate postage information.