Is there a service offered by Ryanair for children traveling alone?
No, Ryanair does not carry unaccompanied minors under 16 years. Children up to the age of 16 years must always be accompanied by an adult passenger. Special facilities like escort services and others are NOT available.
Can a passenger under 16 years be added to an existing reservation?
Although it is not possible to add a passenger under 16 years to an existing flight reservation, you can make a new separate reservation. The passenger under 16 would need to be booked online as an adult, and after completing the booking, you can link it, via live chat or call center, to the existing reservation. Linking the bookings can be done up to 4 hours before departure and is free if the time between making the bookings is less than 24 hours. If the time between making the bookings exceeds 24 hours, you must pay a €/£ 30 booking fee.
Children traveling on a separate booking cannot use Online Check-in and must check in at the airport desk in the presence of the adult traveling on the linked booking.