help with getting from PARIS to Orly Airport
Your travel options summarised...
To get from central Paris to Orly airport (Aéroport d'Orly) can be relatively straightforward. There are a number of choices, depending on your own personal destination and considerations.
The fastest route from central Paris is by RER line B train & OrlyVAL shuttle train.
The Orlybus is also a good option, leaving from Denfert-Rochereau metro station.
Taxis are the first choice, though an expensive one, of many travellers as you are taken directly to your destination. This also applies to the shuttle services which allow you to keep the price down by sharing with fellow travellers or privately for a group.