The child discounts offered by Trenitalia vary depending on the type of train and route:

National trains: 

• Children aged 4 and under (on the day of departure) travel free without a seat reservation. They are expected to sit on the lap of an accompanying adult for the duration of the journey.
• Children aged 4 to 14 are eligible for a 50% discount. 
• Anyone over the age of 14 is given an adult fare. 

Regional trains:

• Children under the age of 4 (on the day of departure) travel free with the exception of Campania, Abruzzo, Lombardy, Sardinia and the autonomous provinces of Trento and Bolzano (see below for details). They are expected to sit on the lap of an accompanying adult for the duration of the journey.
• Children aged 4 to 11 are eligible for a 50% discount. 
• Children aged 12 and up pay the full fare.

Bimbi Gratis fare:

• Allows children under the age of 15 to travel for free when accompanied by a family/group booking of 2-5 people (with at least one adult and at least one child under the age of 15). The other members of the group pay the Basic fare, and the child under the age of 15 travels free.
• This offer is valid on Frecciarossa (Business, Premium and Standard service), Freccibianca and Intercity trains in 1st and 2nd class. This offer excludes Night trains and Executive level trains.

Tip: the unofficial method of booking a reserved seat for a child under the age of 4 on a Trenitalia train is by entering the child's age as 6-11. The child will still receive the 50% discount and s/he will be given a seat on the train.

Tickets for children in the regions of Abruzzo, Bolzano, Lombardia, Trento, and Sardinia: 

Abruzzo: 

• Children under one metre tall who are accompanied by an adult travel free of charge and without a seat. 

Bolzano: 

• Children under the age of 6 travel for free, without a seat, when accompanied by an adult. Children of the age of 6 travel for free as long as they are living in the province of Bolzano and are not yet enrolled in school. 

Campania: 

• Children under the age of 6, accompanied by an adult, travel for free and without a seat. 

Lombardia: 

• Children under the age of 4 (on the day of departure) travel free, without a seat, when accompanied by an adult. 
• Children aged 4-14 are eligible for a 50% discount (on the day of departure). 
• Children aged 14 and up pay the full fare on regional trains. 

Trento: 

• Children under the age of 6 years old who are accompanied by an adult (paying or with a free ticket or ticket pass) travel for free and can have a seat. An adult may travel with up to 5 children under the age of 6 at one time. 

Sardinia: 

• Children under the age of 6, accompanied by an adult, travel for free and without a seat (proof of age has to be supplied upon demand). If an adult is traveling with more than one child under the age of 6, they must purchase a full fare ticket for every two children (e.g. one child travels for free, two children - one full fare ticket, three children - one full fare ticket, four children - two full fare tickets, and so on).