Question : In the next four weeks, what day should you book your trip?
Answer : Since low prices are preferred, look at Jul 15th. As of Jun 19th, it's showing the cheapest ticket sales at $1,642. That is 20% below the average price for this route, so you can spend that extra cash on a fun experience in Lisbon.
Question : If your plans are flexible, have you considered changing your departure day?
Answer : Friday is your cheapest day to fly in the month of July. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.
Question : How long do most people visit Lisbon?
Answer : Of course you're not most people, but if you were, you'd stay roughly 23 days.
Question : Have you considered flying out of an airport besides Ministro Pistarini Airport (EZE)?
Answer : Departing from Ministro Pistarini Airport is not the only way to get to Lisbon Portela Airport. Try looking for flights from Jorge Newbery Airport (AEP) as well. Over the next few months, flights from AEP to LIS are being priced 40% cheaper than flights from EZE to LIS. Being only 19 miles away, it's easily accessible for most.
Question : How much should a trip from Buenos Aires (EZE) to Lisbon (LIS) cost?
Answer : Flight prices are fluctuating a lot more for this route than most routes from Argentina, as they're ranging anywhere from $973 to $3,928. Prices tend to be lower the further out you book.