From London you can take a direct train journey with Eurostar to Disneyland Paris. Either from London St Pancras International, Ebbsfleet International or Ashford International.
This train which passes through the three stations takes you directly to Paris Marne-la-Valée/Chessy station which only a couple of minutes from the park's gates.
The journey time from London St Pancras International is around 2 hours 45 minutes. From Ebbsfleet International 2 hours 25 minutes and 2 hours from Ashford International.
This direct train currently leaves London St Pancras International daily at 10.17 am which is later than previous years, due, say Eurostar, to planned engineering works in France. They review their timetables every six months so we may see a return to earlier departures some time during the summer.
Please note: These Eurostar direct services do not run on Tuesdays or Saturdays except during school holidays.
You also have the option of travelling direct with Eurostar from London St Pancras International or Ashford International to Paris Gare du Nord in the central Paris. It is a journey of approx. 2 hours 15 minutes from London. From Gare du Nord allow yourself another hour by regional train to get to Disneyland.