I am planning to buy tickets from Paris flying to Venice. I am still undecided if we will be okay with just hand carry or if we need hold luggage (checked in luggage). So my dilemma, can I book the flight with no hold luggage purchased first, and then buy hold luggage let's say 1 week before we fly out? Will that cost me more compared to buying my hold luggage right at the moment of booking my flight or will it be the same as long as I do it online and before my day of flight?
I am trying to find this in the website but it only specified adding weight to hold luggage so I don't know how it will be if there is 0kg hold luggage to begin with.