If your flight gets you into Charles de Gaulle late at night the only bus service operating at nis the 'Noctilien', which links the airport with various destinations in Paris, line 140 that goes to Gare de l’Est .The service runs between 00.30am and 5.30am. It picks up passengers from entrance 26 of terminal 1, entrance 2 of terminal 2F and Roissypôle bus station every hour. Fares depend on distance travelled, but can range between €1.50 and € 8.00. The trip should take just under 1 hour.