The French government has been asked to look into ticket pricing at Disneyland Paris amid complaints best-value tickets are not available to everyone.
The probe has been ordered by the European Commission, which is looking into how tourists from some member states are not able to shop around for the best deals.
According to the Financial Times, some French consumers were paying €1,346 for a premium package, while British visitors were charged €1,870 and Germans €2,447.
UK visitors were paying 15% more for one-day tickets, the FT added.
A Disneyland Paris spokesman said promotions were seasonal and run during specific times of the year.
But customers can only pay for tickets for a promotion for a certain country if their credit or debit card is registered in that country. This is to prevent fraud, the spokesman explained.
He added the price of a standard ticket was the same across the European Union market.
