Question : What price range should you expect when booking from San Juan (SJU) to London (STN)?
Answer : Flight prices are fluctuating a lot more for this route than the majority of routes from Puerto Rico, as they're ranging anywhere from $1,324 to $4,047. Prices tend to be lower the further out you book.
Question : How long do most people stay in London?
Answer : Of course you're not most people, but if you were, you'd stay roughly six days.
Question : If your plans are flexible, have you considered changing your departure day?
Answer : The lowest-cost day to fly in March is Monday. Flexibility is paramount when booking travel plans in order to keep travel costs down.