The most practical, fast and easy is the 'ORLYBUS that takes you from the Place Denfert-Rochereau at Orly airport in about 30 minutes (05:30 to 23:30 or so, with a frequency of 20-30 minutes).
The price of this direct service is € 6.60.
Have you always wanted to come in the City of Love, Artists, lights, and the Mysteries of History? That moment has arrived? Do not arrive unprepared! Here you will find all the advice piùpratici that will make the visit to Paris the most comfortable, quiet and interesting.