From Montevideo you go to the bus station which is behind the mall called Tres Cruces (you have to go the lower level of the mall at the back).
The company I went with was COT - it took about 3 hours and they picked up passengers throughout the whole ride.
Buquebus - (the ferry company) also offers bus transportation to and fro - you can check their website for exact prices for both the bus and ferry costs.
The cost is approximately 160 Uruguayan pesos which is about $5USD.


