Question : How long are most people's visits to Buenos Aires when they fly in from Nashville?
Answer : Of course you're not most people, but if you were, you'd stay roughly 16 days.
Question : Would you be willing to change your travel days if it saved you money?
Answer : The cheapest day to fly in December is Wednesday. Being flexible with your travel days garners you even more savings during your booking.
Question : Are prices changing frequently for this route?
Answer : Prices for BNA to EZE do fluctuate a lot more than the majority of routes. However, the sooner you book, the better price you tend to get.