Call forwarding to an International Number

I am working overseas and have a prepaid phone with a local number in that country. Prior to leaving the US again, can I enter the international number of my prepaid phone into the call forwarding feature on my iPhone and have my calls forwarded to that phone? I assume that the person calling my iPhone will not be charged, but will I be charged for making an international phone call each time a call is forwarded to my international phone number? Are there any other charges involved? Has anyone done this before that can tell me how well it works?