Can I use my return ticket if I didn’t use the outbound ticket?
You must fly on the flights or legs that make up the itinerary of your ticket in consecutive order. Otherwise, the itinerary will be canceled in full.
However, in Peru, Brazil, Colombia, Germany and Italy exceptions can be made under certain conditions. Exceptions can also be made in Argentina, Chile and Ecuador, but only for 100% domestic legs.
All other countries are subject to the fare conditions of the ticket.