The train is definitely the easiest way to get from Paris to Nice. From Paris, you can take the TGV high-speed train. There are several trains leaving from Paris each day and the journey takes about 5.5 hours. But you will need to make reservations in advance, and the trip costs anywhere from €50-€100. If you want to take the bus, you’ll probably have to change buses several times or opt to take a bus tour that has a stop in Nice. However, the journey could take as much as 15 hours, compared to just 5.5 hours via train.