How long is the flight from Paris to Orlando?

You can count on 6-8 hours in the air; however, a lot depends on the airline and your flight routing. Plus, you have to allow for security and boarding/luggage handling at each end of the flight. In any case I would suggest looking at a site such as Expedia, Orbis, Travelocity, etc. and making some sample flight plans so you can see how things work out.