About 3 hours
It depends how much money you have .
About 2.5 hours
The Eurostar train takes around 2 hours and 15 minutes to travel from London to Paris.
The Eurostar goes from Paris to London, it doesn't go to Dublin.
http://www.voyages-sncf.com 2 hours and 12 minutes
The Eurostar travels between London and Paris, and between London and Brussels. It does not travel between Paris and Geneva.
The Thalys train from Paris to Brussels will take on average around 1 hour 22 minutes. The train also serves beverages and sandwiches just in case you are hungry and need a drink.
Plan on the trip from Euro Disney to Paris to be between 35-60 minutes, depending if there is no traffic or if the trains are backed up.
There is no direct train from Paris to Scotland. One option is to take a train from Paris to London, and then take another train from London to Scotland. The total travel time can range from around 7 to 11 hours depending on the connections and routes chosen.
The road distance from Paris to Avignon is 692 km. The travel time is about 6H30 by car, or 2H38 when using the TGV (high speed train link).
The quickest train from Brussels to Paris usually takes not very long at all. The quickest train from Brussels to Paris usually takes about one hour and fifteen minutes.
According to raileurope.com a train from Paris to Madrid takes approximately 13 hours.