Buenos Aires to Montevideo

By the Viamo editorial team · Editor Terje Moy · Last updated July 2026 · 4 min read

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Buenos Aires and Montevideo face each other across the Río de la Plata — the world's widest river estuary — separated by roughly 220 km of brown water and not much else. The classic way to cross is by high-speed ferry, and it is one of the more enjoyable intercity journeys in South America: you board at a central terminal, watch the city skyline recede, and arrive in a different country without any airport. Here is how the crossing works and what to expect.

The direct way: Buquebus to Montevideo

Buquebus is the main operator for the direct ferry crossing between Buenos Aires and Montevideo. Fast ferry services run from the Buquebus terminal at Dársena Norte in Buenos Aires (centrally located, about 2 km from the city centre) to the Tres Cruces terminal area in Montevideo, arriving close to the Rambla and the old city.

The direct crossing takes roughly 2 hours 15 minutes to 2 hours 30 minutes on the fast ferry. Buquebus runs several crossings daily in both directions, with frequency varying by season — summer (southern hemisphere, December–February) sees the most services. Fares vary by class: economy seats, premium class and vehicle ferry options are all available. Book ahead in summer and around Argentine public holidays, when the boats fill quickly with locals heading to Uruguay for weekends.

The cheaper two-hop route: Colonia Express via Colonia del Sacramento

Colonia Express runs a separate service from Buenos Aires to Colonia del Sacramento in Uruguay — a crossing of only about 50 km that takes roughly 1 hour on the fast ferry. From Colonia, frequent buses (operated by companies including COT and Turil) run onward to Montevideo in roughly 2 hours 30 minutes to 3 hours.

The Colonia Express ferry fare is often lower than the direct Buquebus crossing, and stopping in Colonia del Sacramento is a pleasure in itself — it is a UNESCO World Heritage town with cobblestone streets and Portuguese-era architecture. If time allows, consider spending an afternoon there before continuing to Montevideo. The total journey time Buenos Aires–Colonia–Montevideo is typically 3.5 to 4.5 hours including the ferry, a wait and the bus ride.

Buquebus also operates its own service via Colonia, so this route has competing options. Compare timetables on both operators' sites when planning.

Taking a vehicle across

Both Buquebus and Colonia Express carry vehicles on some sailings, which is useful if you are on a road trip through South America. Vehicle spaces sell out faster than passenger berths and cost considerably more; book as early as possible. Check current documentation requirements for taking a hire car or privately-owned vehicle across the border, as these can differ from those for passengers.

Flying between Buenos Aires and Montevideo

Several airlines including Aerolíneas Argentinas and LATAM fly between Buenos Aires Ezeiza (EZE) or Aeroparque Jorge Newbery (AEP) and Montevideo Carrasco Airport (MVD). The flight takes under an hour, but add airport transfers and you are looking at three to four hours door-to-door. Flying is worthwhile mainly if ferry prices are high during peak periods or if you are already at the airport for onward connections.

Aeroparque, Buenos Aires's domestic and regional airport, is much more centrally located than Ezeiza and much quicker to reach from the city centre — so flights from Aeroparque often compare more favourably in total time than the airport transfer alone suggests.

Practical tips for the ferry crossing

• Arrive early: immigration queues at the Buenos Aires Buquebus terminal can be long, especially on Fridays and before long weekends.
• Currency: Argentina and Uruguay both have their own pesos, but they are not interchangeable. Exchange or withdraw local currency on arrival in each country.
• Luggage: ferries have reasonable luggage allowances; check the specific operator's limit when you book.
• Duty-free: there are duty-free shops at the Buquebus terminal — useful but not a reason to linger if you are running close on time.

See our guide to coaches in South America for onward travel from Montevideo by bus.

Which should you choose?

For most travellers, the direct Buquebus ferry to Montevideo offers the best balance of speed and ease — central departure, no airport, and you are in Uruguay in under three hours. The Colonia Express + bus combination is worth considering if fares are meaningfully lower or if you want to visit Colonia del Sacramento along the way. Flying makes sense mainly if you are connecting through an airport anyway.

Frequently asked questions

How long is the ferry from Buenos Aires to Montevideo?

The direct Buquebus fast ferry takes roughly 2 hours 15–30 minutes. The two-hop route via Colonia del Sacramento (Colonia Express ferry + bus) takes around 3.5–4.5 hours in total.

Do I need to go through customs and immigration for this crossing?

Yes. Even though you are crossing by ferry, this is an international border. You will clear Argentine exit immigration at the Buenos Aires terminal and Uruguayan entry on arrival. Allow plenty of time.

How often do ferries run between Buenos Aires and Montevideo?

Buquebus runs several direct sailings daily, with more frequent services in the southern summer. Frequency reduces in winter (June–August). Always check current schedules, as they vary by season.

Is it possible to travel by bus from Buenos Aires to Montevideo?

There is no land border between Argentina and Uruguay — the Río de la Plata requires either a ferry or a flight. A very long overland route via Brazil exists but is not practical for most travellers.