It depends on your final destination. The most optimal option would be to book a transfer service, which you can find on the website.
If you're an experienced traveler and want to explore the country using public transportation, then you'll need to take a train to Châtillon/Saint-Vincent and then a bus to Breuil-Cervinia Valtournenche. Detailed train schedules can be found on the website www.trenitalia.it, and information about bus trips can be found here.
Another option is to rent a car. For those who choose this route, you will need to follow the A5 Turin-Aosta highway until the exit for Châtillon/Saint-Vincent, and then continue for about 28 km towards Cervinia.
