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Argentina
Vietnam
Area Comparison
Buenos Aires is 16.5x smaller than Hanoi
Population Comparison
Buenos Aires has 2.6x fewer people than Hanoi
Hanoi is significantly larger, covering 16.5 times the area of Buenos Aires. Hanoi spans 3,359 km² (1,297 mi²) while Buenos Aires covers 203 km² (78 mi²) — a difference of 3,156 km². You could fit Buenos Aires inside Hanoi approximately 16 times.
To put Buenos Aires's size in perspective, its area of 203 km² is roughly the same size as Amsterdam. Meanwhile, Hanoi at 3,359 km² is about 1.2x smaller than Rhode Island.
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
Vietnam's capital with over a thousand years of history. Also known as "The City of the Ascending Dragon", Hanoi has an area of 3,359 km² and is home to 8.1 million people. Its history stretches back to 1010. Visitors come for Hoàn Kiếm Lake, Old Quarter (36 Streets), Ho Chi Minh Mausoleum, and much more. Getting around is easy with the Hanoi Metro.
Hanoi's Old Quarter has been a trading hub for nearly 1,000 years, with each street historically dedicated to a specific trade
Looking beyond city limits, the Buenos Aires metropolitan area covers 4,758 km², which is 1.4x larger than greater Hanoi at 3,359 km². The Buenos Aires metro area is also more populous, with 15.2 million people compared to 8.1 million.
Buenos Aires has a population density of 15,074 people per km² — an extremely dense urban environment. Hanoi, with 2,397 people per km², is a moderately dense city. Buenos Aires is dramatically more crowded, with 6.3x the population density.
This comparison spans continents — Buenos Aires in South America versus Hanoi in Asia. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Both cities share a humid subtropical climate, though local geography creates distinct microclimates in each. When it's noon in Hanoi, it's 2:00 AM in Buenos Aires — a 10-hour time difference.
Size Ratio
Buenos Aires fits inside Hanoi ~16 times
Density Gap
Buenos Aires is 6.3x more densely populated
Time Difference
10 hours apart
History
Hanoi is ~526 years older
The straight-line distance from Buenos Aires to Hanoi is 17,855 km (11,095 miles), with an estimated flight time of ~21h 30m. See full distance details, including timezone difference and city facts.
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