France buses (08.92.35.08.20) leave daily from Montparnasse (Rue du Commandant Mouchotte, 15th, M° Montparnasse) and Gare de Lyon (20 bis blvd Diderot, 12th, M° Gare de Lyon),every 30 min, 6am-10:30pm, 6am-10pm, from airport (Onboard : 17€ one way, 29€ round trip/Online: 15.50€ one way, 26€ round trip). Buses also leave from the Arc de Triomphe (1 ave Carnot, 17th, M° Etoile), and Porte Maillot (Blvd Gouvion St Cyr, 17th, M° Porte Maillot), every 30 min, 5:45 am-11pm (Onboard : 17€ one way, 29€ round trip/Online: 15.50€ one way, 26€ round trip). Take RER B (9.50€) or catch the Roissybus (10€) at 11 rue Scribe, 9th, M° Opéra, every 15 min between 5:45am and 8pm, every 20 min between 7pm and 10pm and every 30 minues between 10pm and 11pm. (01.58.76.16.16). The RER B, direction St-Rémy, connects with Orlyval, an automatic train, at Antony. Orlyval runs every 5-7 min, 6 am-11 pm (8.70€). The RER C direction Massy-Verrières connects with a shuttle bus that goes to Orly (6.45€). Or take Orlybus outside the Denfert-Rochereau Métro stop (14th), every 20 min 5:35 am-11 pm (7.20€). Air France buses leave from the Invalides (rue Esnault Pelterie, M° Invalides) the Arc de Triomphe (1 ave Carnot, 17th, M° Etoile) and Gare Montparnasse (rue du commandant Mouchotte, M° Gare Montparnasse) every 20 minutes, 5am-10:40pm from airport 6am-11:40pm (Onboard: 12€ one way, 20€ round trip/Online: 11€ one way, 18€ round trip). Buses leave daily from the bus parking lot on Blvd Pershing near Hotel Concorde Lafayette (17th, Mo Porte Maillot). Arrive 3 hrs and 15 min before departure time (13€). Or take TER train from Gare du Nord to Beauvais (11.50€, 1 hr 20 min), then taxi to airport. Air France buses leave daily from Charles de Gaulle (Roissy) from 5:55am to 10:30pm for Orly Airport/ departures from Orly Airport to Charles de Gaulle Airport from 6:30am to 10:30pm. (Onboard: 20€ one way, 34€ round trip/Online: 18€ one way, 30.50€ round trip). Frequency: every 30 minutes. Journey takes 45 to 60 minutes. Also RER B from Charles de Gaulle to the Antony station then the OrlyVal service to Orly Sud. OrlyVal metros leave daily from 6am-11pm from Antony and Orly Sud. Travel time between the two airports is about 1 hour and 10 minutes.