The best way to travel around Ardennes is by car. It provides convenience and flexibility in exploring the area without depending on public transport. Car rental in France cost around $50-$100 per day, depending on the type and company you choose. The tour will approximately take 4 hours of driving throughout the day to all destinations planned.
If you have more time, you can add more must-see sights like the Charleville-Mézières, Bouillon Castle, or the Meuse Valley, famous for its great landscape and historical landmarks. Also, be sure to bring comfortable shoes since some of the destinations require walking.
Ardennes doesn't have an international airport; however, you can fly into Paris airports like Charles de Gaulle (CDG) or Orly (ORY), then catch a domestic flight or take the TGV train directly to Champagne-Ardenne TGV station, 60km north. The nearest airport is Metz–Nancy–Lorraine (ETZ), located 100 km away.