Compare: São Paulo→Buenos Aires (1,675 km) vs São Paulo→Rio de Janeiro (361 km). São Paulo → Rio de Janeiro wins by 1,314 km (78%). Side-by-side with flight & drive times.
By SnapDistance Team · Updated April 21, 2026
1,675 km
1,041 miles · Flight: ~2h 36min · Drive: ~27h 13min
361 km
224 miles · Flight: ~57 min · Drive: ~5h 52min
✓ Shorter route
Difference: 1,314 km (78%) · Flight time difference: ~1h 39min
Verdict
São Paulo → Rio de Janeiro is the smarter pick if travel time and emissions matter most: it is 1,314 km (78%) shorter, saves about 1h 39min of flight time, and cuts roughly 335 kg of CO₂ per passenger. Choose São Paulo → Buenos Aires only if the destination itself is the reason for the trip.
São Paulo → Rio de Janeiro is the shorter route at 361 km, which is 1,314 km (78%) shorter than São Paulo → Buenos Aires. You would save approximately 1h 39min in flight time by choosing the shorter route.
| Metric | São Paulo → Buenos Aires | São Paulo → Rio de Janeiro |
|---|---|---|
| Distance (km) | 1,675 | 361 |
| Distance (miles) | 1,041 | 224 |
| Flight time | ~2h 36min | ~57 min |
| Driving time | ~27h 13min | ~5h 52min |
| Road distance (est.) | ~2,178 km | ~469 km |
| Drivable? | Yes | Yes |
| Cross-continental | No | No |
| Initial bearing | 220° (SW) | 79° (E) |
| Time-zone shift | -1h | None |
| CO₂ – flight (per pax) | ~427 kg | ~92 kg |
| CO₂ – driving (per car) | ~372 kg | ~80 kg |
| Fuel cost (est.) | ~$218 USD | ~$47 USD |
Flying from São Paulo to Buenos Aires produces roughly 427 kg of CO₂ per passenger, based on the ICAO/EEA short-haul emission factor of ~0.255 kg per passenger-km. The São Paulo → Rio de Janeiro flight emits about 92 kg. Choosing the shorter route saves approximately 335 kg of CO₂ per traveler — equivalent to 16 typical tree-years of carbon sequestration. For comparison, driving emits roughly 372 kg and 80 kg per car respectively — meaningful only when the car carries multiple passengers.
The São Paulo to Buenos Aires route covers 1,675 km (1,041 miles), staying within South America. São Paulo (population: 12,325,232) is located in Southeast, Brazil, while Buenos Aires (population: 3,075,646) is in Buenos Aires, Argentina.
The São Paulo to Rio de Janeiro route covers 361 km (224 miles), remaining within South America. São Paulo (population: 12,325,232) is in Southeast, Brazil, and Rio de Janeiro (population: 6,748,000) is in Southeast, Brazil.
Flying from São Paulo to Buenos Aires takes approximately 2h 36min, while São Paulo to Rio de Janeiro takes 57 min. If driving is an option, expect roughly 27h 13min for the first route and 5h 52min for the second.
Since both routes depart from São Paulo, this comparison is especially useful for travelers deciding between Buenos Aires and Rio de Janeiro as a destination.
The 1,314 km difference between these routes is substantial and will significantly impact travel time and cost.
Both routes are drivable, with road distances of approximately 2,178 km and 469 km respectively. For road trips, the shorter route saves roughly 1,709 km of driving.
Buenos Aires (Argentina) has a population of 3,075,646 and is located in the Buenos Aires region of South America. It's a significant city with good transport links and cultural offerings.
Rio de Janeiro (Brazil) has a population of 6,748,000 and is situated in Southeast, South America. This major global city has multiple airports and world-class infrastructure.
Choose this route if your priority is reaching Buenos Aires (Argentina) — a city of 3,075,646 in the Buenos Aires region of South America. Despite being the longer of the two at 1,675 km, it makes sense when Buenos Aires itself is the destination, the schedule fits better, or ticket prices are noticeably lower. Driving is realistic at this distance, with an estimated 2,178 km of road and a fuel cost band around $218 USD. The initial bearing is 220° (SW), so a great-circle flight leaves São Paulo heading roughly SW.
This route is the right call if you are heading to Rio de Janeiro (Brazil) — a city of 6,748,000 in the Southeast region of South America. It is also the shorter of the two at 361 km, saving about 1h 39min of flying and around 335 kg of CO₂ per passenger. Driving is feasible — expect roughly 469 km of road and a fuel cost in the $47 USD range. Departing São Paulo, the great-circle bearing toward Rio de Janeiro is 79° (E).
São Paulo (-23.55°, -46.63°) and Buenos Aires (-34.60°, -58.38°) sit with a time-zone shift of -1 hour. São Paulo (-23.55°, -46.63°) and Rio de Janeiro (-22.91°, -43.17°) share an approximate time zone. Both routes have manageable time-zone shifts, so jet lag should not be a major factor.
Rio de Janeiro is closer at 361 km, which is 1,314 km (78%) shorter.
1,675 km (1,041 miles). Flight: ~2h 36min.
361 km (224 miles). Flight: ~57 min.
Flying to Rio de Janeiro is faster at ~57 min, saving about 1h 39min compared to Buenos Aires.
All distances on SnapDistance are calculated using the Haversine formula, which determines the great-circle distance between two points on Earth's surface. This gives the shortest possible distance over the globe, which is the measurement used for aviation and navigation. Actual travel distances by road or rail are typically 20-40% longer due to terrain, borders, and infrastructure routing. Flight times assume 800 km/h cruising speed with 30 minutes for takeoff and landing. Driving estimates use 80 km/h average speed with a 30% road distance factor.
📍 Data: Coordinates from OpenStreetMap contributors. Distances calculated using the Haversine formula. Travel times are estimates only. Last verified: April 21, 2026.