Question : How much should a trip from Indianapolis (IND) to Lisbon (LIS) cost?
Answer : Flight prices are fluctuating much more for this route than the majority of routes from the United States, as they're ranging anywhere from $667 to $4,237. Prices tend to be lower the further out you book.
Question : How long do most people stay in Lisbon?
Answer : Of course you're not most people, but if you were, you'd stay roughly 12 days.
Question : What is the cheapest day to fly in the next four weeks?
Answer : Since low prices are preferred, look at Aug 16th. As of Jul 17th, it's showing the cheapest ticket sales at $1,329. That is 33% below the average price for this route, so you can spend that extra money on an adventure in Lisbon.
Question : If your plans are flexible, have you considered changing your departure day?
Answer : The lowest-cost day to fly in August is Wednesday. Flexibility is paramount when booking travel plans in order to keep travel costs down.