Low-cost Ouigo TGVs are to start running between Roissy-Paris Charles de Gaulle airport and Toulon from December 10, allowing people to travel between the two in four hours.
The announcement coincides with the SNCF opening reservations for Christmas holiday trips on its website.
The new line to Toulon will have one return trip each day, stopping at Marne-La-Vallée Chessy, Lyon Saint-Exupéry and Aix-en-Provence TGV.
Passengers can book their travel up to July 5 via the Ouigo website with prices starting at €16.
Ouigo already offers low-cost routes from Paris-Roissy Charles de Gaulle to TGV Haute Picardie, Lille Flandres, Lyon Saint-Exupéry and Marseille Saint-Charles.