Lima, Peru → Buenos Aires, Argentina · ✈ 4h 25min · 🚗 50h 59min
1,694 nautical miles · Time difference: +1h ahead · Direction: southeast
The distance from Lima to Buenos Aires is 3,137 km (1,949 miles). The fastest way to travel is by flight. A direct flight takes approximately 4h 25min.
The straight-line distance from Lima, Peru to Buenos Aires, Argentina is approximately 3,137 kilometers (1,949 miles or 1,694 nautical miles). This measurement uses the Haversine formula, computing the great-circle distance — the shortest path between two points on Earth's surface.
Buenos Aires is located southeast of Lima. Lima is in South America, in the Lima region of Peru, while Buenos Aires is in South America, in Buenos Aires, Argentina. Both cities are in South America.
| Mode | Distance | Est. Time | Best For |
|---|---|---|---|
| ✈️ Flight | 3,137 km | ~4h 25min | Best option for speed |
| 🚗 Drive | ~4,078 km | ~50h 59min | Long journey, consider stops |
Our recommendation: flight is typically the best way to travel from Lima to Buenos Aires. For 3,137 km, flying saves significant time and is usually the most practical choice.
Based on an estimated road distance of 4,078 km, fuel costs for driving from Lima to Buenos Aires are approximately $326–$612 USD (at $0.08–$0.15 per km, depending on vehicle efficiency and local fuel prices). Additional costs may include tolls, parking, and accommodation for longer trips.
Lima sits at 12.0464°S, 77.0428°W, while Buenos Aires is located at 34.6037°S, 58.3816°W. The initial compass bearing from Lima to Buenos Aires is 146° (SE), so a great-circle flight path leaves Lima heading roughly SE. Because the Earth is curved, the actual heading shifts gradually along the route — pilots and navigation systems update it continuously instead of holding a single fixed compass bearing.
The latitude difference is 22.56° and the longitude difference is 18.66°. Each degree of latitude represents about 111 km, which is one reason cross-latitude routes feel longer even when the map looks similar to east–west journeys.
The geographic midpoint between Lima and Buenos Aires is approximately 23.6017°S, 68.5217°W. This is the great-circle halfway position — the spot where you would be exactly 1,569 km from each city. On long-haul flights this point usually falls over open ocean or remote terrain, which is why in-flight maps often look "empty" mid-route.
Buenos Aires is roughly 1 hour ahead of Lima. When it is 09:00 in Lima, it is approximately 10:00 in Buenos Aires. Daylight saving time can shift the offset by an hour during certain months, so confirm the exact difference for your specific travel dates.
Lima uses the Peruvian Sol (PEN), while Buenos Aires uses the Argentine Peso (ARS). Plan to exchange currency before departure or use a low-fee travel card on arrival — airport rates are typically the worst available. Both destinations share Spanish as a primary language, simplifying signage, transit, and everyday interactions.
Lima is a major city in Peru with a population of approximately 10,092,000. Located in the Lima region, it is an important hub in South America. As one of the largest cities in Peru, Lima is a major international gateway with extensive air connections and multiple airports.
Buenos Aires is a notable city in Argentina with a population of approximately 3,075,646. Situated in the Buenos Aires region, it serves as a key destination in South America. Buenos Aires offers solid transport connections and a variety of arrival options as a major city in Argentina.
→ See all distances from Buenos Aires
3,137 km is a long-distance route that typically requires air travel. This is comparable to spanning a large continent. For context, London to Dubai is about 5,500 km.
The 3,137 km between Lima and Buenos Aires means a beam of light could travel this distance in approximately 10.5 milliseconds — but a flight still takes 4h 25min.
Combined, Lima and Buenos Aires have a population of over 13,167,646 people, making this a major urban corridor.
See how the Lima to Buenos Aires distance compares to similar routes:
The straight-line distance from Lima to Buenos Aires is approximately 3,137 kilometers (1,949 miles, 1,694 nautical miles).
A direct flight takes approximately 4h 25min, based on 800 km/h cruising speed plus 30 minutes for takeoff and landing.
Estimated driving time is approximately 50h 59min, based on 80 km/h average speed and roads being ~30% longer than straight-line distance.
Buenos Aires is approximately +1h ahead compared to Lima.
The estimated road distance is approximately 4,078 km, which is about 30% longer than the 3,137 km straight-line distance.
📍 Data: Coordinates from OpenStreetMap contributors. Distances calculated using the Haversine formula. Travel times are estimates only. Last verified: April 21, 2026.