While Colonia is served by an airport ( Colonia international airport) most travelers usually don't fly into Colonia and opt to visit the town as a day trip from either Buenos Aires or Montevideo.
It takes between 4-6 hours to explore the town since it's quite small.
How to Get to get from Buenos Aires to Colonia.
The most common way of traveling between these two cities is by ferry. The duration of the crossing from Buenos Aires to Colonia is approximately 2 hours.
If you're visiting Colonia for a day then heading to Montevideo afterward, don't take the ferry-bus combo. Buses leave for Montevideo almost immediately after arriving at the Colonia port and you won't have time to do anything in Colonia. Colonia's bus terminal ( Terminal De Omnibus) is located adjacent to the ferry, 10 minutes walk away. If you'll be heading to Montevideo from Colonia after your day trip, take a bus from here. It takes 3 hours to get to Montevideo from Colonia. There's a luggage storage area at the bus station where you keep your bags for a few hours while exploring the town.
All immigration clearance is done at Puerto Madero in Buenos Aires. This is the port from where all ferries depart.
Once you get your Argentina visa exit stamp, they'll direct you to the Uruguay booth to get your visa entry stamp.
How to get to Colonia Del Sacramento from Montevideo
The most common way of travel between these two cities is by bus. All buses to Colonia depart from the Tres Cruces bus terminal. All booking information is available on their website.
Top attractions in Colonia
Colonia is a small town and all attractions are within walking distance from the port. The city is a UNESCO world heritage site and these are some of its top attractions.
The barrio histórico ( Historic quarters)
Rio De Plata and the marina
Museums. Most of them are within the historic quarter. They showcase Spanish, Portuguese and indefinite cultures.
Plaza De Armas and Church Matriz, the oldest church in Uruguay.