In May we are flying into CDG on a Sunday Morning. Staying at a Hotel in Zone 1. Need to transport to Le Havre on a Tuesday for a cruise. Will be back to Le Havre following Tuesday, will be staying in Paris Zone 1 till Thursday/Friday (haven't booked flights yet). I saw the Zone 1-5 week pass (forgot what it was called Navago?), what would be the way to get back & forth to Le Havre on train?