Sure, a coach tour is the way forward if you intend to explore places on the way to Peru. With a coach tour you can expect to see the following places
Chile tour:
San Pedro de Atacama
Geysire El Tatio
Road to Iquique
Iquique - Tacna
Tacna - Arequipa
Colca Valley
Colca-Canyon
Patagonia
Peru
tour:
Sacred Valley
Pisac and Ollantaytambo
Machu Picchu
Road to Puno
Puno - Arica