It is all very subjective. It depends on where in Paris you are coming from, traffic, and where in Normandy you want to go. Normandy is a big place and parts of it are not all that far away from Paris. From Downtown Paris though to the beaches of Normandy would be a 4-5 hr drive.
To travel from Paris to Istanbul without flying, you can take a train and bus combination. Start by taking a train from Paris to Munich, then continue by train to Vienna. From Vienna, take a bus to Istanbul, or consider traveling by train to Bucharest and then catching a bus or train to Istanbul. The journey will take several days, but it allows you to see various cities along the way.
For a train journey from Milan to Zurich it would take approximately four hours to get one way.
According to raileurope.com a train from Paris to Madrid takes approximately 13 hours.
About 4 Hours.
clear 3 hours
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.
About 3 hours
1 hour
7 to 8 hours.
This depends on if you take a bullet train or regular train. Regular train is actually about 13 hours. 5 hours
1hr 45min to 2hr 05min Paris (CDG) to Vienna (VIE) by a nonstop flight operated by Niki, Air Berlin, Air France or Austrian Airlines.
To be honest, it's probably better to fly, but if you want to take the train, you will need to take a train first from Barcelona to Venice in Italy. Then you will need to take the train from Venice to Vienna.