What would be the best way to get from Roissy CDG to Orly airport? Airfrance bus? RER? We arrive at 11:30am and got a connection at 3:15pm Orly airport.Any sugestion?
I sent you a private message, but I don't know if it went through. To be safe, I'll post a regular note, too.
The fastest route with the most frequent service would be the RER B from CDG to Antony and the Orlyval driverless shuttle train from Antony to Orly. The cost is 16.95 EUR.
The Air France bus runs every 30 minutes and the cost is 16.00 EUR. While the drivers have GPS systems to help them avoid congestion, it's still possible to be delayed by heavy traffic.