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Argentina
USA
Area Comparison
Buenos Aires is 3.0x smaller than Chicago
Population Comparison
Buenos Aires has 1.1x more people than Chicago
Chicago is significantly larger, covering 3.0 times the area of Buenos Aires. Chicago spans 606 km² (234 mi²) while Buenos Aires covers 203 km² (78 mi²) — a difference of 403 km². You could fit Buenos Aires inside Chicago approximately 2 times.
To put Buenos Aires's size in perspective, its area of 203 km² is roughly the same size as Amsterdam. Meanwhile, Chicago at 606 km² is roughly the same size as Seoul.
Argentina's capital and a cultural powerhouse of South America. Known as "The Paris of South America", Buenos Aires covers 203 km² with a population of 3.1 million. The city was established in 1536. Buenos Aires is known for Tango dancing, La Boca neighborhood, Recoleta Cemetery, among other attractions. The city's main transit system is the Buenos Aires Subte.
Buenos Aires has more bookstores per capita than any other city in the world
Third-largest city in the United States. Often called "The Windy City", Chicago has an area of 606 km² and is home to 2.7 million people. It was established in 1833. Visitors come for Deep-dish pizza, Willis Tower, Millennium Park & Cloud Gate, and much more. Getting around is easy with the CTA (L train).
Chicago reversed the flow of the Chicago River in 1900, an engineering feat that still stands
Looking beyond city limits, the Chicago metropolitan area covers 28,160 km², which is 5.9x larger than greater Buenos Aires at 4,758 km². The Buenos Aires metro area is also more populous, with 15.2 million people compared to 9.5 million.
Buenos Aires has a population density of 15,074 people per km² — an extremely dense urban environment. Chicago, with 4,455 people per km², is a moderately dense city. Buenos Aires is dramatically more crowded, with 3.4x the population density.
This comparison spans continents — Buenos Aires in South America versus Chicago in North America. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Buenos Aires has a humid subtropical climate while Chicago experiences humid continental conditions. When it's noon in Buenos Aires, it's 9:00 AM in Chicago — a 3-hour time difference.
Size Ratio
Buenos Aires fits inside Chicago ~2 times
Density Gap
Buenos Aires is 3.4x more densely populated
Time Difference
3 hours apart
History
Buenos Aires is ~297 years older
The straight-line distance from Buenos Aires to Chicago is 9,012 km (5,600 miles), with an estimated flight time of ~11h 6m. See full distance details, including timezone difference and city facts.
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