バス、シャトル、鉄道、タクシーなど

www.aeroportsdeparis.fr/

Connections
CDG2 Orly Ouest
と入力
www.aeroportsdeparis.fr/Adp/en-GB/Passagers/Arrivees/EnCorrespondance/
AeroportALAutre/DunAeroportALautre.htm

You are landing at Paris-CDG2, your connecting flight
leaves from Paris-Orly Ouest

鉄道よりもバスでしょう。

By Air France coach:
You will find the coaches at the following points:
- Terminals 2A and 2C: exit 2 from Terminal 2C.
- Terminals 2B and 2D: exit 2 from Terminal 2B.
- Terminals 2E and 2F: exit 3 from the Gallery.
Timetables and prices :
- Monday to Friday from 6 am to 22:30 pm
- Saturdays and Sundays from 7 am to 22:30 pm
- Frequency: every 30 minutes
- Price: €16

日本語で、

www2t.biglobe.ne.jp/~provence/provence/travel/transport/
transport02.html

一時間は必要なので、
AF279、AF271、AF275ならばXG1021、AF277ならばXG1019でしょう。
AF275/XG1021は無理だと思います。

後は、www.paris-shuttle.com/?gclid=CILimeGuj5QCFREOewodwlpQgA

between Orly Airport & Charles De Gaulle Airport
From 75,00 € Per vehicle
かタクシーでしょう。