Orly => Paris

Métro: Orlyval

30 mn, 8,8 euros (half-price if you are under 10), every 5 mn at rush hours, connection with line B - RER (Denfert-Rochereau, Saint-Michel, Châtelet-Les Halles,...).

Bus: Air France

30 mn, 7,50 euros, every 15 mn, , Montparnasse, Invalides.

Orlybus RATP 215

25 mn, 5,70 euros, every 12 mn, to Denfert-Rochereau.

Train: Orly Rail Navette, RER C

40 mn, 5,35 euros, every 15 mn, connection with line C - RER (Austerlitz, Saint-Michel,...).