Paris - cheapest way to go from downtown to de gaulle airport?

Question

how many euros? and by what? (trains, shuttles, buses, taxis)

Answer 1

The best way to go is by train. Take the RER B line. It's much faster than by car or bus and it costs about 8.20 euros.

The bus or a shuttle might be a little cheaper, but it could take a lot longer. Paris traffic can be very bad. You won't save enough to make it worthwhile.

Answer 2

RER B, less than 9 euros.