Obtain a U.S. passport application form online from the U.S. Department of State website. You can also pick up an application from a local passport acceptance facility, usually a county or government agency. As a naturalized citizen you are eligible to apply immediately, although if this is your first passport you are required to submit the application to the passport agency in person, according to Department of State guidelines.
Complete the passport application. If this is your first U.S. passport, do not sign the application until you are instructed to do so at the passport agency by an officer. Have a passport photograph taken professionally and photocopy both sides of your government-issued photo identification and Social Security card.
Gather your paperwork including your ID, Social Security card, photocopies, certificate of naturalization, passport photo and fees and submit to the passport acceptance facility. The status of your application will be available on the Department of State website five to seven days after applying. Routine processing and delivery of the passport normally takes four to six weeks.
After you have received your U.S. passport in the mail, you can begin researching airfares to fulfil the roundtrip ticket requirement for entry to Peru. Visit online ticket agencies to compare ticket prices and purchase your ticket. From the United States, most tourists fly into the Jorge Chávez International Airport, in the capital city of Lima.