You can easily fly from La Paz to Uyuni and then drive to Laguna Colorado or hire a taxi driver. If you dont want to plan the transportation to Laguna Colorada, a one-day tour can be as cheap as $20 including the transport
Salar d'Uyuni
Le moyen le plus simple de s'y rendre est le bus. La plupart des grandes villes de Bolivie proposent des lignes de bus vers Uyuni.