I fly JB all the time and their fares go up and down like a roller coaster! Keep in mind that if you buy they will give you a credit for the price difference if you call when the price drops and the credit is good for one year from the day they put it in your true blue account. One of the nice things is that if you are a family, all of the credit can be put into ONE account (usually mine) so that it's easy to apply later. I fly them so often that I generally know the price structure well. I just bought tickets from them for 3 trips a few days ago. I like to buy one way tickets as it's easier for me to keep track of, especially for credits. My fare for October is only $59 out of Dulles airport, which is EXCELLENT! so I jumped right on it. Now I'm waiting to buy my return flight for November when it gets released! I have an account with Yapta and I enter all of my current upcoming flights and they monitor any drops for me when I can't. They are great about emailing you when the price changes. You can monitor fares you are watching and/or fares you have purchased (I do both).