Is St Cheron (RER C) in zone 5 or 6 (as some maps show)?.
I need to know if a Paris visit pass zones 1-5 will cover me for travel there?
Can I buy a 3 day zone 1-5 Paris visit pass at St Cheron station?
St Cheron is in zone 5 so a 5 zone Paris Visite pass will cover you for Paris to St Cheron. A 3 day 1-5 zone Paris Visite will work fine.