Uyuni

Plan to arrive a day or two before you intend to depart on a salt flat tour, especially if there are only 2 of you. That gives the chance to meet other travellers, thus a larger group has more bargaining power for the 'daily rate'.

By bus

You will need 12-15 hours from La Paz, by bus. The bus ride can be bitterly cold in winter - travellers have been known to sit in their sleeping bags on the night bus from Oruro to Uyuni. With other options Todo Tourismo,Trans Omar and Panamerica Sur you must change buses in Oruro to get to La Paz. Beware that even though Panamericana has a direct line, heating and toilet, it is notorious for breaking down, and the ride can easily take 8 hours more than promised. Buses to Oruro/La Paz are often booked up in advance - you likely need to book at least the day before, several days if you wish to take the comfortable tourist bus or one of the better bus companies - best to do this before going on a Southwest Circuit tour if coming from San Pedro de Atacama, be prepared to spend a night in Uyuni and have little choice of bus company.

There are several buses daily to and from Potosí 6-7 hours, 30 Bs., from there you can go one to Sucre 3-4 hours more. Beware however, companies such as Transporte 11 de Julio have been known to cancel buses without notice, and without even opening their office to explain.

Many daily departures around 5:30 - 6:00 AM for Tupiza, stopping halfway for lunch in Atocha, 7-8 hours, 60 Bs. Three days a week there are 9 AM departures, and occasionally a Land Cruiser departs 6-7 PM, -ask around. Although the train is definitely smoother, and somewhat faster, this bus ride offers terrific views.