Can I use my return ticket if I didn’t use the outbound ticket?
The flights or legs that make up the itinerary of your ticket must be flown in consecutive order. If not, the itinerary is canceled entirely.
Nevertheless, some exceptions may be made in Peru, Brazil, Colombia, Germany or Italy. Exceptions may also be made in Argentina, Chile and Ecuador, but only for 100% domestic legs.
All other countries are subject to the ticket’s fare conditions.