We're going to Saint Jean de Luz and my wife and I wanted to meet a friend in Nice. It seems there is no sane way of getting from A to B. All this information gives the costs for 2 people obtained from Rome2Rio...
Drive: Estimate gas costs = $200-$300, plus the cost of renting the car
Bus: Only $120, but we’d have to leave the day before we planned to, and it’s an overnight drive (leave 9:30 PM, arrive 11:30 AM)
Train: SNCF, $460, plus it’s an overnight trip, going by way of Paris and having to go to 2 different stations in Pari (leave 1:30 PM, arrive 9 AM)
Plane: $475, and all of them go by way of Paris - one went St-Jean-Paris-Amsterdam-Nice (leave 11:20 AM, arrive 5:30 PM)