Can I use the same RER B ticket when I will transfer to metro? Ex. CDG-Denfert-Rochereau (RER B) – Raspail (Metro) By | January 23, 2017 | in Vote Up 0 Vote Down Answered Public Public Private Questions Anonymous asked January 23, 2017 1 answer Vote Up 0 Vote Down Public Ben Lam ⋅ Staff ⋅ January 23, 2017 Yes #1 Please login or Register to Submit Answer Username or Email Address Password Remember Me