What is the best way to get from CDG or Orly into Paris?
From Orly, Metro 14 is the simplest public-transport default for most travellers heading into central Paris. From CDG, RER B is usually the practical rail choice if you are travelling light and your hotel is easy to reach from the line. With heavy luggage, young children or a late arrival, an official taxi can be worth the extra cost for door-to-door ease. Decide before you land, and do not accept rides from drivers soliciting inside the terminal.
Answer
Paris airport transfers are not just about price. A solo traveller with one bag and daylight may be happy on rail; a family after a long flight may get better value from a straightforward official taxi or booked transfer. The weak point is the moment after customs when everyone is tired, hungry and surrounded by offers. Know your route, check current official options and avoid unofficial approaches. A calm arrival does not make the trip glamorous, but it prevents the first hour from becoming the story.
Recheck before you go
Transport schedules can change. Check current timings before you book around them.