Traveling from the U.S. to Italy:

  1. At U.S. airport check-in: present your U.S. passport.
  2. At security screening: present your U.S. passport.
  3. At boarding (flight to Italy/EU): present your U.S. passport.
  4. Upon arrival in Italy (EU immigration): present your Italian passport.

Traveling from Italy to U.S.:

  1. At Italian airport check-in: present your U.S. passport.
  2. At Italian exit immigration: present your Italian passport.
  3. At boarding (flight to U.S.): present your U.S. passport.
  4. Upon arrival in the United States (U.S. immigration): present your U.S. passport.