France Climbing

From the US: Save up your $ and ride in one of those fancy aeroplanes. Ask the pilot nicely to drop you off in Paris. Unless of course, you'd rather spend weeks at sea developing scurvy. I suggest the former.

There's more than one way to travel, depending on which carrier, you can plan to land at different airports:
Charles de Gaule CDG & Orly ORY - Paris, center of the country, Fontainebleau
Nice NCE - Southeast, 05 Southern Alps, Gorge du Verdon, Ceuse
Marseille MRS - South, 06 Provence, Calanques, Buoux, Volx
Toulouse Blagnac TLS - Southwest, 07 Pyrenees, Occitanie
Geneva GVA - Alps! Chamonix Mont Blanc

Don't automatically grab a car at your arriving airport, often it's cheaper to commute using a cheap city hopper flight or train ride, once at destination, a car often becomes helpful but not mandatory since the public transit system is very widespread.