Question : How long do most people stay in Nashville when they fly in from Seoul?
Answer : Of course you're not most people, but if you were, you'd stay roughly 24 days.
Question : Is price more important than specific travel days for you?
Answer : For the month of February, the cheapest day to fly is Wednesday. Being flexible with your travel days garners you even more savings during your booking.
Question : How often are prices changing for this route?
Answer : Prices for ICN to BNA do change much more than the majority of routes. Remember, you can save by booking further in advance.