Originally Posted by
irishguy28
I would venture that it might be cheaper to buy two one-ways now, and throw away the one you don't end up using.
My advice, though, would be to book the ticket that you know you can make, and not worry about trying to make an earlier flight.
While this is not quite the answer about the CDG/ORY swap rule, your advice is well taken. Now the flights show 59€ oneway, so it will be after all cheaper to book both and throw away another one, than paying merely 70€ change fee + booking class difference for a Basic+ change.