How long will it take a postcard to reach the U.S. from Peru?

It takes about two weeks for a postcard to reach the U.S. from Peru (although it may take less time if sent from Lima). The national post office service of Peru is Serpost, and there is a post office in most villages. Serpost is reliable but somewhat expensive — it costs US$2-4 to send a postcard or letter to the U.S. or Europe. Courier services like FedEx and DHL can be used to ship packages out of Peru.