The Wayro route from Buenos Aires to Nueva Helvecia, Uruguay is 277 miles (446 km), about 6 h 5 min of driving without stops. You cross from Argentina into Uruguay at about mile 167, at the Gualeguaychú–Fray Bentos bridge.
Full advisory: Argentina, Uruguay. Advisory issued: Argentina July 10, 2026; Uruguay July 28, 2026; checked October 10, 2026.
On the roads, the State Department says:
- Argentina: “Drivers in Argentina tend to be aggressive, especially in Buenos Aires, and often ignore traffic regulations.”
- Uruguay: “If you are in an accident involving injury, stay in place until a police officer arrives.”
| Total distance | 277 mi (446 km) |
|---|---|
| Time at the wheel, no stops | 6 h 5 min |
| Main roads, in order | AV1-N → RN9 → RP6 → RN12 → RN14 → RN136 |
| Border crossing | about mile 167, Argentina → Uruguay (the Gualeguaychú–Fray Bentos bridge) |
| Regions on the route | Ciudad de Buenos Aires, Buenos Aires, Entre Ríos, Río Negro, Soriano, Colonia |
| Fuel estimate (car at 25 mpg) | about 11.1 gal; actual use varies by vehicle and traffic |
| Stops listed below | 8 |
Border crossing: what to bring for Uruguay
The route crosses at about mile 167, at the Gualeguaychú–Fray Bentos bridge, from Entre Ríos into Río Negro. Plan on two checks on each side: immigration for your passport and customs for the car.
| Entering Uruguay (U.S. citizens) | No visa needed for visits of 90 days or less. Passport: must be valid for 6 months beyond your arrival date. |
|---|---|
| Driving in Uruguay | You can drive on your U.S. license. |
| Entering Argentina (U.S. citizens) | No visa needed for visits of 90 days or less. Passport: must be valid when you enter; leave a blank page for the entry and exit stamps. |
| Driving in Argentina | A valid U.S. license usually works; an International Driving Permit is recommended. |
| Rental car | Cross only if the rental company authorizes it in writing and gives you the papers for the border; ask before you book. |
Sources: U.S. State Department, Uruguay (updated August 13, 2026); U.S. State Department, Argentina (updated July 16, 2026). Checked October 10, 2026; rules change, so confirm before you go.
On the road from Buenos Aires to Nueva Helvecia
RN12 (47 mi) and RN9 (40 mi) carry about 31% of the 277 miles. The first 167 miles are in Argentina; the last 110 are in Uruguay. It runs through 6 regions: Ciudad de Buenos Aires, Buenos Aires, Entre Ríos, Río Negro, Soriano, Colonia. Of the 8 stops listed below, 1 are within a mile of the road.
Road-by-road breakdown: Buenos Aires to Nueva Helvecia
| Road | Route miles (from–to) | Length, mi | Region |
|---|---|---|---|
| local roads | 0–2 | 2 | Ciudad de Buenos Aires |
| AV1-N | 2–8 | 6 | Ciudad de Buenos Aires |
| connecting roads | 8–10 | 2 | Ciudad de Buenos Aires |
| RN9 | 10–50 | 40 | Ciudad de Buenos Aires, Buenos Aires |
| RP6 | 50–55 | 5 | Buenos Aires |
| RN12 | 55–102 | 47 | Buenos Aires, Entre Ríos |
| RN14 | 102–138 | 36 | Entre Ríos |
| local roads | 138–145 | 7 | Entre Ríos |
| RN136 | 145–164 | 19 | Entre Ríos |
| connecting roads | 164–167 | 3 | Entre Ríos |
| local roads | 167–277 | 110 | Río Negro, Soriano, Colonia |
- Mile 11 of this route: Ciudad de Buenos Aires → Buenos Aires (region line)
- Mile 72 of this route: Buenos Aires → Entre Ríos (region line)
- Mile 167 of this route: Entre Ríos → Río Negro (international border)
- Mile 183 of this route: Río Negro → Soriano (region line)
- Mile 247 of this route: Soriano → Colonia (region line)
What to see on the way from Buenos Aires to Nueva Helvecia
- Right off the route (under 1 mile): Cathedral of Mercedes (mile 185)
- Nature and outdoors: Ciervo de los Pantanos National Park (mile 42)
- Museums and history: Sarmiento Historical Museum (mile 7), Carnacini House Museum (mile 12), Museo del Estudio Jurídico (mile 14), Gualeguaychú Cathedral (mile 144), Alejandro Berro Paleontology Museum (mile 181), Cathedral of Mercedes (mile 185)
Sarmiento Historical Museum
In the Belgrano neighborhood of Buenos Aires, the Sarmiento Historical Museum covers the Generation of '80 and the life of President Domingo Faustino Sarmiento, with sections on Nicolás Avellaneda and the 1880 federalization.
Carnacini House Museum
Painter Ceferino Carnacini lived for fifty years in the house that is now the Carnacini House Museum (Museo Casa Carnacini), a municipal art museum in Villa Ballester, Argentina.
Museo del Estudio Jurídico
Founded in 2015, the Museo del Estudio Jurídico sits on 9 de Julio Street in the commercial center of San Isidro, Argentina.
Ciervo de los Pantanos National Park
About 2,500 hectares of wetlands in Campana, Buenos Aires province, are protected as Ciervo de los Pantanos National Park. It's a Ramsar Site and home to the marsh deer and plenty of waterbirds.
Gualeguaychú Cathedral
St. Joseph's Cathedral, also called Gualeguaychú Cathedral, serves as the cathedral church of the Roman Catholic Diocese of Gualeguaychú in Argentina.
Frigorífico Anglo del Uruguay
Liebig exported meat extract and corned beef from this spot on the Uruguay River at Fray Bentos starting in 1865. In 1924, the Anglo plant began shipping frozen meat from the same site.
Alejandro Berro Paleontology Museum
In a 19th-century building in Mercedes' Parque Castillo Mauá, this paleontology museum opened in 1946 around the collection of naturalist Alejandro Berro; a well-preserved glyptodon shell found on a nearby riverbank is a highlight.
Cathedral of Mercedes
Since 1960, the Diocese of Mercedes has had its seat at the Cathedral of Our Lady of Mercy, the main Catholic church in this Uruguayan city.
More drives to Nueva Helvecia
- Tacuarembó to Nueva Helvecia
- Salto to Nueva Helvecia
- Rivera to Nueva Helvecia
- Artigas to Nueva Helvecia
- Minas to Nueva Helvecia
- Maldonado to Nueva Helvecia
More drives from Buenos Aires
- Buenos Aires to Magdalena
- Buenos Aires to Ayacucho, Argentina
- Buenos Aires to Sierra de La Ventana
- Buenos Aires to Luján
- Buenos Aires to San Antonio de Areco
- Buenos Aires to Arrecifes
Continue Your Adventure
Frequently asked questions
How long does it take to drive from Buenos Aires to Nueva Helvecia, Uruguay?
About 6 h 5 min of driving without stops, over 277 miles.
What is the driving distance from Buenos Aires to Nueva Helvecia, Uruguay?
About 277 miles (446 km) on the Wayro route. Other map services may show a few miles more or less, depending on where they start and end in each city.
Where does the Buenos Aires to Nueva Helvecia drive cross the border?
At about mile 167, from Argentina into Uruguay, at the Gualeguaychú–Fray Bentos bridge.
What do U.S. citizens need to drive from Buenos Aires into Uruguay?
No visa needed for visits of 90 days or less. Passport: must be valid for 6 months beyond your arrival date. You can drive on your U.S. license. (U.S. State Department, updated August 13, 2026.)
What does the U.S. travel advisory say about the Buenos Aires to Nueva Helvecia drive?
The U.S. State Department rates Argentina Level 1: Exercise Normal Precautions; Uruguay Level 2: Exercise Increased Caution. Read the full advisory before you go.
Which highways go from Buenos Aires to Nueva Helvecia?
In order: AV1-N, RN9, RP6, RN12, RN14 and RN136. The road-by-road table above shows the route miles for each one.
Where can you stop on the way from Buenos Aires to Nueva Helvecia?
Closest to the road: Sarmiento Historical Museum (museum, mile 7, 1 mi from the route); Gualeguaychú Cathedral (cathedral, mile 144, 1 mi from the route); Cathedral of Mercedes (cathedral, mile 185, 0.7 mi from the route). All stops are described above.
How we put this guide together
Wayro calculates the route from OpenStreetMap road data; mile numbers are positions along this route, not highway markers, and "from the route" distances are straight-line, so the real detour depends on access roads. Stops are chosen from parks, natural sites, museums, historic sites and attractions close to the route: at least one strong stop for each stretch of the drive, then the best-known places nearest the road, up to nine in all. Places that are closed, private or not open to visitors are removed. Place descriptions are written by the Wayro team from official park, museum, tourism and government websites and other published sources. Safety levels and entry rules were checked against the U.S. Department of State on October 10, 2026. Conditions change, so check the linked sources before you travel.
Route data © OpenStreetMap contributors.