On the 31st of May at KI, not sure how much a single Fast Lane pass will be, but I know when I was looking at getting 4 online, they were $70 a piece for the +, and I don't think that they have separate prices for online and at gate on FP. But trust me, it is worth it, although I have never been to Cedar Point with a FP. Only have been there once actually, and wasn't into rides that much at that time. I do know that CP FL and FL+ are more expensive.