Question : Who's offering the cheapest round-trip flight to Lisbon Portela Airport (LIS) over the coming months?
Answer : Aer Lingus is offering the best deal at $1,302. Better snatch it up quickly because prices range all the way up to $1,614 over the next three months.
Question : Are you paying the cheapest or highest price for your ticket to Lisbon?
Answer : Prices for this trip tend to fluctuate a lot less than other flights from the United States. They can range from $1,302 to $1,614. However, the sooner you book, the better price you tend to get.