I need to travel from Charels Airport to Issy-les-Moulineaux using RER Train. How much is the cost of the ticket. By | April 28, 2018 | in Vote Up 0 Vote Down Answered Public Public Private Questions Anonymous asked April 28, 2018 I need to travel from Charels Airport to Issy-les-Moulineaux using RER Train. How much is the cost of the ticket. 1 answer Vote Up 0 Vote Down Public Ben ⋅ Staff ⋅ May 2, 2018 10.30€ one way #1 Please login or Register to Submit Answer Username or Email Address Password Remember Me