By plane: a shuttle Linkbus provides a connection fromthe airports of Lyon and Grenoble with Le Mônetier depending on the season.
By train: from Modane ( Transitalia train from Paris to Modane ) a regular shuttle will get you to Le Mônetier in 1h50.
From Briançon station (TER, Night train from Paris) this shuttle takes you to Monêtier-les-Bains in 30 minutes.
By bus: Regular Linkbus shuttles from Lyon, Grenoble and Briançon stations.
By car: Via the Col du Lautaret from Lyon or Grenoble, via the Fréjus tunnel from Lyon, via Sisteron from Marseille and Montpellier. Note that it may be wise to find out about the opening of the Col du Lautaret depending on weather conditions.