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.
7 to 8 hours.
About 3 hours
1 hour
1hr 45min to 2hr 05min Paris (CDG) to Vienna (VIE) by a nonstop flight operated by Niki, Air Berlin, Air France or Austrian Airlines.
This depends on if you take a bullet train or regular train. Regular train is actually about 13 hours. 5 hours
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.