Two times a day from Nice to Corsica sail the car ferries of the company La Meridionale. The sea vessel follows the route Nice - L'Ile Rousse, the road takes 5 hours and 15 minutes. The cost of the trip is about 30 EUR one way per person. You can book tickets by phone, at one of the carrier's agencies or on-line at the official website.

Also on the ferries of La Meridionale you can go from Nice to Sardinia