Hi Sally,
Actually, the fastest way to get from
Beauvais Airport to
Euro Disney is to take the
Beauvais Airport Shuttle directly to Paris, which stops at Porte Maillot inside of Paris. From the
shuttle bus stop at Porte Maillot you'll need to
walk to the Metro station (shown on this Google map) and buy a
Billet Ile-de-France to
Marne La Vallée, the Disney train station. This is easiest done through the ticket window where you can simply ask for "Euro Disney" and the ticket seller will know what type of ticket you need.
With this one ticket you can make the trip from
central Paris to Euro Disney via the Metro and RER A train. At Porte Maillot you'll need to first take Metro Line 1 in direction Chateau de Vincennes until station Charles de Gaulle Etoile. From there change to the RER A line in direction Marne La Vallée Chessy (Euro Disney). Take the RER A right to the end where it stops at Disney. The
RER A to Euro Disney will take about 45 minutes as it's not actually inside central Paris, but quite a bit out east in the greater Paris area.
Best regards,
Ben