Here's what he has planned with all times in BST.
Wednesday 23 September
2:15 p.m - Welcoming ceremony at the White House. Speech from Pope Francis followed by meeting with the President of the United States.
4pm - Pope meets with the bishops of the United States in St. Matthew's Cathedral and delivers a speech.
9:15 p.m - Mass for the canonization of Blessed Fr. Junipero Serra at the National Shrine of the Immaculate Conception.
Thursday 24 September
2:20 p.m - Pope Francis addresses the United States Congress
4:15 p.m - Visits St. Patrick's parish and meets a group of homeless people
9:00 p.m - Departs from Washington, D.C.
10:00 p.m - Arrives at JFK Airport in New York City.
11:45 p.m - Pope celebrates Vespers at St. Patrick's Cathedral.
Friday 25 September
1:30 p.m - Address at the United Nations
4:30 p.m - Pope visits Ground Zero Memorial site and delivers a speech.
9:00 p.m - Pope visits "Our Lady, Queen of Angels" school and meet with families of immigrants in Harlem.
11:00 p.m - Mass in Madison Square Garden. Homily by Pope Francis.
Saturday 26 September
2:30 p.m - Arrives at Philadelphia International Airport.
3:10 p.m - Mass with the bishops, clergy and men and women religious in the Cathedral of Sts. Peter and Paul in Philadelphia.
9:45 p.m - Meeting with the Hispanic community and other immigrants.
Sunday 26 September
00:30 a.m - Speech to the World Meeting of Families in Philadelphia.
2:15 p.m. - Meeting with the bishops invited to the World Meeting of Families.
4:00 p.m - Visit to the prisoners at the Curran-Fromhold Correctional Facility, Philadelphia. Speech from Pope Francis.
9:00 p.m - Mass at the World Meeting of Families in Philadelphia. Homily delivered by Pope Francis.
Monday 28 September
00:00 a.m - Meeting with organizing committee of the World Meeting of Families.
00:45 a.m - Farewell ceremony.
1:00 a.m - Departs from Philadelphia.