The RER train service from CDG Airport goes through the centre of Paris and is probably the cheapest form of travel to Disneyland Paris. At Chatelet station, Line B interconnects with Line A which runs out to Disneyland (station name Marne-la-Vallée).

The most economical way to travel from Charles de Gaulle (CDG) to Disneyland Paris is typically the RER train system, specifically taking the RER B to Châtelet-Les Halles and then transferring to the RER A (Marne-la-Vallée/Chessy direction). A one-way ticket costs approximately €16 to €20, which is significantly cheaper than the "Magical Shuttle" bus (€24) or a taxi (up to €100). While the TGV high-speed train is the fastest (only 9 minutes), it can cost anywhere from €20 to €45 depending on how far in advance you book. For the absolute lowest price, travelers sometimes use local buses or a combination of the "RoissyBus" to central Paris followed by the RER A, though this is much more time-consuming. If you are traveling in a group of 4 or more, a pre-booked private transfer or an Uber might actually work out to be a similar price per person as the train while offering door-to-door convenience, but for solo travelers or couples, the RER remains the budget-friendly gold standard for reaching the magic.