Question : What day in the next four weeks has the best fares?
Answer : Since low prices are preferred, look at Mar 7th. As of Feb 20th, it's showing the cheapest ticket sales at $753. That is 4% below the average price for this route, so you can spend that extra money on an adventure in San Jose.
Question : What price range should you expect when booking from Rio De Janeiro (GIG) to San Jose (SJO)?
Answer : Flight prices fluctuate a lot less than most routes from Brazil for GIG to SJO. They vary from $753 to $800. The further out you book a route, the more likely you are to save.
Question : How long do most people stay in San Jose?
Answer : Of course you're not most people, but if you were, you'd stay roughly nine days.
Question : Would you be willing to change your travel days if it saved you money?
Answer : The cheapest day to fly in March is Tuesday. Being flexible with your travel days garners even more savings during booking.