Question : Should you take that vacation to Lisbon in the next 30 days?
Answer : Since low prices are preferred, look at December 19th. As of November 28th, the cheapest ticket sales are coming in 11% below the average price for this route, so you can spend that extra cash on an adventure rather than the flight.
Question : How long are most people's visits to Lisbon when they fly in from Nashville?
Answer : Of course you're not most people, but if you were, you'd stay roughly nine days.
Question : Would you be willing to change your travel days if it saved you money?
Answer : The lowest-cost day to fly in December is Monday. Flexibility is paramount when booking travel plans in order to keep costs down.
Question : Do prices fluctuate more for this route than others?
Answer : Flight prices for BNA to LIS change a lot more than most routes. The further out you book a route, the more likely you are to save.