Hello,
I know this is kind of an old thread, but ... . My sister is a dual citizen of US/Argentina. She was born in Argentina, but hasn't been back for about 40 years. She still has her old DNI card and a very expired Argentinian passport(about 22 years old). She is going to go visit Argentina in November of this year and gong to take some domestic flights. She wants to book one of them now. Can she use her old DNI card and book discounted rate tickets for the in-country flights or would that be not kosher? Her husband who is not Argentinian is going with her and they would buy him a non-discounted ticket.They will be taking Aerolíneas Argentinas for the in-country flights. Yes, I know, not great airline,but has to take it due to schedule or something.
Thanks,
Ceci