Question : What is the cheapest day to fly in the next four weeks?
Answer : Since low prices are preferred, look at Mar 15th. As of Feb 27th, it's showing the cheapest ticket sales at $1,136. That is 17% below the average price for this route, so you can spend that extra money on a fun experience in Taipei.
Question : How much should a trip from San Jose (SJO) to Taipei (TPE) cost?
Answer : Flight prices change much less than most routes from Costa Rica for SJO to TPE. They range from $1,136 to $1,550. Prices tend to be lower the further out you book.
Question : How long do most people stay in Taipei?
Answer : Of course you're not most people, but if you were, you'd stay roughly 28 days.
Question : Is price more important than specific travel days for you?
Answer : The cheapest day to fly in March is Wednesday. Flexibility is paramount when booking travel plans in order to keep travel costs down.