Question : What is the cheapest day to fly in the next four weeks?
Answer : Since low prices are preferred, look at Mar 6th. As of Feb 20th, it's showing the cheapest ticket sales at $1,069. That is 28% below the average price for this route, so you can spend that extra cash on an adventure rather than the flight.
Question : Are you paying the cheapest or highest price for your ticket to Lima?
Answer : Flight prices fluctuate less than most routes from China for PVG to LIM. They vary from $1,069 to $2,049. The further out you book a route, the more likely you are to save.
Question : How long do most people visit Lima?
Answer : Of course you're not most people, but if you were, you'd stay roughly 17 days.
Question : If your plans are flexible, have you considered changing your departure day?
Answer : The cheapest day to fly in March is Monday. Flexibility is paramount when booking travel plans in order to keep travel costs down.