You can travel to the island of Noirmoutier from Lille by train and bus in five steps:
1) Take a train from Lille to Nantes, with a connection in Paris, departing from either Lille Flandres or Lille Europe stations.
2) Transfer between Paris Gare du Nord and Gare Montparnasse. Depending on your connection time and preferences, you can use the metro, a self-service bike, a taxi, etc. Note: Depending on the period, some direct Lille–Nantes trains may be available without a connection in Paris.
3) Proceed to the Nantes bus station, located opposite the south exit of the Nantes SNCF train station.
4) Rejoignez la gare routière de Nantes, en face de la sortie sud de la gare SNCF de Nantes.
5) Board the Aléop line 13 coach ("Nantes – Fromentine – Noirmoutier"). This line serves several stops across the four communes of the island of Noirmoutier: Barbâtre, La Guérinière, L’Épine, and the Noirmoutier-en-l’Île bus station, which is the terminus.
Duration:
Approximately 6 hours and 3 minutes from Lille Europe or Lille Flandres to Noirmoutier-en-l’Île bus station, without a connection in Paris.
Approximately 6 hours and 13 minutes from Lille Flandres or Lille Europe to Noirmoutier-en-l’Île bus station, with a connection in Paris.