Question : What day in the next four weeks has the best fares?
Answer : Since low prices are preferred, look at Mar 6th. As of Feb 27th, it's showing the cheapest ticket sales at $707. That is 60% below the average price for this route, so you can spend that extra cash on a fun experience in Prague.
Question : What price range should you expect when booking from Jacksonville (JAX) to Prague (PRG)?
Answer : Flight prices change much more than the majority of routes from the United States for JAX to PRG. They vary anywhere from $682 to $3,979. Prices tend to be lower the further out you book.
Question : How long do most people visit Prague?
Answer : Of course you're not most people, but if you were, you'd stay roughly 13 days.
Question : If your plans are flexible, have you considered changing your departure day?
Answer : In March, Monday is your lowest-cost day to fly. Flexibility is paramount when booking travel plans in order to keep travel costs down.