Eurolines
A trans-European bus company that offers trips from across Europe and Morocco to Paris. Generally offers prices significantly cheaper than the train at the cost of much longer journeys. The Parisian office is located at Bagnolet, adjacent to the Gallieni metro station.
By plane
Paris is served by three international airports - for more information, including arrival/departure times, check the official sites.
By car
Several autoroutes expressway, motorway link Paris with the rest of France: A1 and A3 to the north, A5 and A6 to the south, A4 to the east and A13 and A10 to the west. Not surprisingly, traffic jams are significantly worse during French school holidays.
The multi-lane highway around Paris, called the Périphérique BP, is probably preferable to driving through the center. Another beltway nearing completion; L'A86 also A186 and A286 loops around Paris about 10 km further out from the Périphérique. A third, incomplete beltway is much further out and called La Francilienne N104.
It is advised not to drive in the Paris Metro Area. It is better to drive to a suburban train station with a parking lot and then use the train to continue your trip throughout Paris. Most of Paris' roads were created long before the invention of automobiles. Traffic inside the city tends to be heavy, especially at rush hour; driving, however, may be rather easy and efficient in the evening. Parking is also difficult. Furthermore, the medieval nature of parts of the city's street system makes it very confusing, and traffic will almost never allow one to stop or slow down to get one's bearings. If you are unfamiliar with the streets and still insist on driving in the city, make sure you have a navigator in the passenger seat with you.