Paris Travel Guide - HTML5

 Gare de Lyon - Gare de I'Est (25min): Metro line 14 to Chatelet, direction St. Lazzare followed by Metro line 4 direction Porte de Clignancourt.  Gare de Lyon - Gare Montparnasse (30min): Metro line 14 to Chatelet, direction St. Lazzare followed by Metro line 4 direction Mairie de Montrouge. Alternatively, Metro line 14 to Bercy then line 6 direction Charles de Gaulle-Etoile.  Gare de Lyon - Gare de Bercy (15min): A free shuttle runs between the two every half hour. Alternatively, Metro line 14 direction Olympiades to Bercy.

From Gare Montparnasse

 Gare Montparnasse - Gare du Nord