well, you'd figure 7 days from Ohio to the furthest parts of S. America by air, so tack on a week by boat if there happens to be a boat going there when your package arrives. I would bet whatever camp you're wanting to send to has shipping suggestions.
Your answer depends on the address of the recipient, and the time of year that you send your letter.
Mail is generally received by most Antarctic research station addressees between October and February. Otherwise, there is generally no mail delivery.
1-2 days
3.426 seconds
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First class mail is delivered in 3 to 5 days
First class mail is delivered in 3 to 5 days
First Class Mail is delivered in 3 to 6 days.http://wiki.answers.com/How_long_will_it_take_to_mail_a_letter_from_Oregon_to_NY#ixzz15y40zD3z
first class mail is delivered in 3 to 5 days
First class mail is delivered in 3 to 5 days