Depending on the destination, it is very important to make sure you have the necessary documents (identity card, passport, visa) as without these you may refused permission to board, as well as refused entry into the country to which you are travelling.
For Ryanair flights :
Present a valid piece of paper identification with a photo (identity card, passport).
NB: Infants (less than 2 years old) must have their own ID or passport
European Union : Present a national identity card or a valid passport.
Other countries : make sure you have a valid passport, as well as a visa if required by the destination country. Get information from your travel agency or the airline in question.
Do not forget to check the validity date of your identity card and passport:
Since January 2014 the French national identity card is valid for 15 years, as opposed to 10 years previously. Cards provided before this date benefit from an extension of 5 years to your validity. However, there is no extension for people who were less than 18 years old when they created their ID card.
Specific information for minors travelling alone on flights outside of French territory: From 15 th of January 2017, minors travelling alone must present a form of authorisation to leave the country (AST - autorisation de sortie du territoire) signed by the holder of parental custody, for all international flights including those to destinations within the European Union. It must be accompanied by a copy of the identification of the person who signed the AST
NOTE: Ryanair does not accept unaccompagnied minors under 16 years old.
For more information we invite you to consult the site of the French Ministry of Foreign Affairs and International Development.