I am flying to Paris on 15th September and staying at the hotel ibis paris porte d'italie. What near station should I get, Porte D'Italie or Gentille (rer zone 2). And how much the ticket fare to be paid?
Taking the RER B train from CDG directly to Gentilly station and walking (about 10 minutes) from there is your best option. Cost is 12.20€