City comparison · time difference and converter
Seoul is 12 hours ahead of Buenos Aires right now. Buenos Aires sits in Argentina on Buenos Aires; Seoul sits in South Korea on Seoul. They are roughly 19,432 km apart (12,074 mi), a flight of about 23h 52m. Buenos Aires's metro holds around 15.4 million people; Seoul's around 25.7 million.
Slot 1
00:00 / 12:00
Buenos Aires / Seoul
Partial overlapSlot 2
01:00 / 13:00
Buenos Aires / Seoul
Partial overlapSlot 3
02:00 / 14:00
Buenos Aires / Seoul
Partial overlapEach row is one hour in Buenos Aires. Green rows are inside business hours in both cities; amber means only one side is at their desk; grey rows fall outside business hours in both.
Local Election Day
Seoul, South Korea · 지방 선거일
Wed, Jun 3
Memorial Day
Seoul, South Korea · 현충일
Sat, Jun 6
Anniversary of the Passing of General Martín Miguel de Güemes
Buenos Aires, Argentina · Paso a la Inmortalidad del General Martín Miguel de Güemes
Mon, Jun 15
General Manuel Belgrano Memorial Day
Buenos Aires, Argentina · Paso a la Inmortalidad del General Manuel Belgrano
Sat, Jun 20
Great-circle distance
19,432 km
(12,074 mi)
Approximate flight
23h 52m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
12h
Roughly 1 day to adjust per timezone crossed
The heatmap gives you the shape of the day. If you need to convert one specific hour — say a customer call or a release window — open the converter with both cities already loaded.
Open in converter →The difference between Buenos Aires and Seoul is not really a number, it's a daily rhythm. Seoul is 12 hours ahead of Buenos Aires on the clock today, but the lived version is that Seoul is wrapping up the working day while Buenos Aires is still in the morning, and the overlap people actually use is narrow. That gap, more than the raw offset, is what teams have to design around.
In Buenos Aires, the working day picks up earliest in the financial districts — Buenos Aires's downtown core wakes early and breaks for lunch at the usual hour. The mood in Seoul is its own story: Seoul settles into the evening at the usual hour, with the local commuter pattern setting the pace. If you are scheduling between the two, the heatmap above marks the rows where both patterns line up.
Daylight saving is the other thing to keep an eye on. Argentina either observes DST or holds a fixed offset year-round; South Korea either follows its region's DST pattern or stays put all year. When the two changes are weeks apart, the offset between Buenos Aires and Seoul is one hour off the usual for that stretch — a cliff that catches recurring calendar invites unless your calendar app rebases them automatically. Pin the meeting to a city, not an offset, and the tool handles the rest.
For travellers, the 23h 52m flight is the short version of the story. The longer one is jet lag: roughly one day of adjustment per timezone crossed, which means a trip across the 12-hour gap costs about 12 groggy days on each side. Pilots and cabin crew swear by morning sunlight and an early walk; whatever your routine, the wall-clock numbers above are the source of truth for your first morning in the new city.