Barcelona
101 km²
Buenos Aires
203 km²
Spain
Argentina
Area Comparison
Barcelona is 2.0x smaller than Buenos Aires
Population Comparison
Barcelona has 1.8x fewer people than Buenos Aires
In terms of area, Buenos Aires is 2.0x the size of Barcelona. Buenos Aires spans 203 km² (78 mi²) while Barcelona covers 101 km² (39 mi²) — a difference of 102 km². You could fit Barcelona inside Buenos Aires approximately 2 times.
To put Barcelona's size in perspective, its area of 101 km² is roughly the same size as Paris (city proper). Meanwhile, Buenos Aires at 203 km² is roughly the same size as Amsterdam.
Picture Barcelona another way: its area is large enough to fit about 14,000 American football fields, 50 times the area of Monaco, or 30 times the area of Central Park. Buenos Aires, by comparison, equals about 28,000 American football fields, 100 times the area of Monaco, or 60 times the area of Central Park.
Barcelona is a city on the northeastern coast of Spain. It is the capital and largest city of the autonomous community of Catalonia, as well as the second-most populous municipality of Spain. With a population of 1.7 million within city limits, its urban area extends to numerous neighbouring municipalities within the province of Barcelona and is home to around 5.7 million people, making it the fifth most populous urban area of the European Union after Paris, the Ruhr area, Madrid and Milan.
Known as "Ciutat Comtal", Barcelona covers 101 km² with a population of 1.7 million. The city was founded around 230 BC. Barcelona is known for Sagrada Familia, Park Güell, La Rambla, among other attractions. The city's main transit system is the Barcelona Metro (TMB).
Barcelona is the second-most populous municipality in Spain and the capital of the autonomous community of Catalonia.
Buenos Aires, officially the Autonomous City of Buenos Aires, is the capital and largest city of Argentina. It is located on the southwest of the Río de la Plata. Buenos Aires is classified as an Alpha− global city, according to the GaWC 2024 ranking. The city proper has a population of 3.1 million and its urban area has a population of 16.7 million, making it the 21st most populous metropolitan area in the world.
Often called "Paris of South America", Buenos Aires has an area of 203 km² and is home to 3.1 million people. The city dates back to 1536. Visitors come for La Boca's Caminito, Recoleta Cemetery, Teatro Colón, and much more. Getting around is easy with the Buenos Aires Subte.
Buenos Aires is classified as an Alpha− global city according to the GaWC 2024 ranking.
Looking beyond city limits, the Buenos Aires metropolitan area covers 4,758 km², which is 5.9x larger than greater Barcelona at 803 km². The Buenos Aires metro area is also more populous, with 15.2 million people compared to 5.6 million.
Barcelona has a population density of 16,436 people per km² — an extremely dense urban environment. Buenos Aires, with 15,074 people per km², is an extremely dense urban environment. Both cities have comparable density, though Barcelona is slightly more compact.
This comparison spans continents — Barcelona in Europe versus Buenos Aires in South America. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Barcelona has a Mediterranean climate while Buenos Aires experiences humid subtropical conditions. When it's noon in Barcelona, it's 8:00 AM in Buenos Aires — a 4-hour time difference.
Size Ratio
Barcelona fits inside Buenos Aires ~2 times
Time Difference
4 hours apart
History
Barcelona is ~1,766 years older
Barcelona covers 101 km². Cities with a similar urban footprint include Lisbon (100 km²), Paris (105 km²), Copenhagen (91 km²), Vancouver (115 km²), or Zurich (88 km²).
Buenos Aires covers 203 km². Cities with a similar urban footprint include Helsinki (214 km²), Amsterdam (219 km²), Stockholm (188 km²), Osaka (225 km²), or Boston (232 km²).
The straight-line distance from Barcelona to Buenos Aires is 10,466 km (6,503 miles), with an estimated flight time of ~12h 49m.
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