Transportation to and from the airport
There are a few alternative ways to travel from the different airports into Paris.
Roissybus and Orlybus have several bus lines. The one from Charles De Gaulle takes you straight to the Opera house inside Paris and the one from Orly takes you to the train station Denfert-Rochereau where you can take either the Metro or the RER B in to central Paris. This is the cheapest alternative of the busses and my first recommendation.
LeBusDirect have four lines but only two for CDG. They end up at Triumphal Arch or Montparnasse and cost slightly more than Roissybus, but if they end up near your hotel you might save some money on the Metro.
The third and cheapest alternative from CDG is the train RER B, which is a train that goes directly from the airport to town. Personally I rarely use that one because of the neighborhood it travels trough isn’t the nicest one, especially late evenings and at night.
If you travel with Ryan Air or any other low-cost companies you might end up in the middle of nowhere that they in France call Beauvais. There is one shuttle bus that regularly goes in to Paris or actually Porte Maillot which is a large bus hub where you can take either RER or Metro
Taxi is another option but chose to leave it out when prices from the airport into Paris can differ a lot depend of where you are going, as you might know, Paris is a large city..
Inside Paris you have three options if we are talking about public transports.
RER, Metro and buses. The easiest way to explain the difference between the railway based ones are the sizes and where they are going. Metro is more inside Paris compared to RER, which is going further out from Paris as to the Airports, Disneyland Paris and Versailles.
Our selected Paris journeys.
Addresses & Google maps
Busstation at the Opera house (RoissyBus)