Sundays: Most Sundays at 12:00 PM, the Pope delivers a brief address and blessing from his apartment window. No tickets are necessary.
Wednesday General Audience: Most Wednesdays around 9:00 AM, either outside in St. Peter's Square or inside the Paul VI Audience Hall depending on the weather. Request free tickets online via the Prefecture of the Papal Household or ask for assistance through the Pontifical North American College Visitor's Office for English speakers. You can also try picking up remaining tickets directly from the Swiss Guard at the Bronze Door (St. Peter's Square) the afternoon before.
By mail: Bishop’s Office for U.S. Visitors to the Vatican Casa Santa Maria Via dell’Umiltà, 30 00187 Rome, ITALY Requests should include the number of people attending, the exact date, and the applicant’s address and/or fax number. A brief introduction of the group, along with a letter of recommendation from their pastor or another Church authority, is also recommended. Tickets are issued only on the afternoon prior to the audience. They can be collected at the aforementioned office on Tuesday from 3:00 p.m. to 7:00 p.m., or on Wednesday morning at 8:00 a.m.
General Audiences and the Holy Father's Liturgical Celebrations are always free of charge.
Vatican website for participating in papal audiences and pontifical celebration
Private Audiences Private, one-on-one audiences are strictly reserved for heads of state, prime ministers, major ambassadors, and high-ranking religious or global leaders.