I suspect that the OP is one of these people (who appear on FT from time to time) who have never bothered to read the details of any FF program, and are operating under the delusion that miles in a FFP are equivalent to the # of miles you are permitted to travel with them. Thus, "several thousand" points converted to FF miles, together with some additional, could take them where they want to go.

I can think of no other explanation for the OP's post. And once this type of OP has figured out how the world actually works ....