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In South Korea, cities are at a moderate distance from each other, with an average distance of 187 km between the 10 most populated cities. The following matrix shows all distances between the main cities.
| Seoul | Busan | Incheon | Daegu | Daejeon | Gwangju | Ulsan | Changwon | |
|---|---|---|---|---|---|---|---|---|
| Seoul | - | 330 km 205 mi | 27 km 17 mi | 237 km 147 mi | 140 km 87 mi | 268 km 166 mi | 307 km 191 mi | 301 km 187 mi |
| Busan | 330 km 205 mi | - | 334 km 208 mi | 94 km 58 mi | 203 km 126 mi | 193 km 120 mi | 55 km 34 mi | 35 km 22 mi |
| Incheon | 27 km 17 mi | 334 km 208 mi | - | 244 km 151 mi | 137 km 85 mi | 256 km 159 mi | 316 km 197 mi | 304 km 189 mi |
| Daegu | 237 km 147 mi | 94 km 58 mi | 244 km 151 mi | - | 121 km 75 mi | 171 km 107 mi | 75 km 47 mi | 72 km 45 mi |
| Daejeon | 140 km 87 mi | 203 km 126 mi | 137 km 85 mi | 121 km 75 mi | - | 139 km 86 mi | 196 km 122 mi | 171 km 106 mi |
| Gwangju | 268 km 166 mi | 193 km 120 mi | 256 km 159 mi | 171 km 107 mi | 139 km 86 mi | - | 222 km 138 mi | 161 km 100 mi |
| Ulsan | 307 km 191 mi | 55 km 34 mi | 316 km 197 mi | 75 km 47 mi | 196 km 122 mi | 222 km 138 mi | - | 67 km 42 mi |
| Changwon | 301 km 187 mi | 35 km 22 mi | 304 km 189 mi | 72 km 45 mi | 171 km 106 mi | 161 km 100 mi | 67 km 42 mi | - |
Among the 10 main cities, the longest distance is 334 km, between Incheon and Busan. If the group is expanded to the 25 largest cities, the longest distance is between Goyang-si and Busan, with 345 km. In the group of the 100 main cities, the longest distance is between Kosong and Seogwipo, with 594 km.
| Group | From → To | Distance |
|---|---|---|
| Among the main 10 cities | From Incheon to Busan | 334 km (208 mi) |
| Among the main 25 cities | From Goyang-si to Busan | 345 km (214 mi) |
| Among the main 100 cities | From Kosong to Seogwipo | 594 km (369 mi) |
The greatest latitudinal distance (north to south) is also from Kosong to Seogwipo, with a displacement of 5.13 degrees of latitude in geographic coordinates, which is approximately equivalent to 567 km.
In the longitudinal direction (west to east), the greatest distance is from Pohang to Mokpo, with a displacement of 1.22 degrees of longitude, which is approximately equivalent to 268 km. The total distance between these cities is 302 km.
International routes from cities in South Korea reach significant distances, such as the 19,436 kilometers between Seoul and Buenos Aires, covering a transcontinental connection between Asia and South America. Below are some international distances from South Korea.
| Seoul → London | 8,880 km |
| Seoul → Los Angeles | 9,607 km |
| Seoul → Sydney | 8,297 km |
| Seoul → Paris | 8,989 km |
| Seoul → Tokyo | 1,155 km |
| Seoul → Buenos Aires | 19,436 km |
| Busan → London | 9,209 km |
| Busan → Los Angeles | 9,645 km |
| Busan → Sydney | 7,977 km |
| Busan → Paris | 9,319 km |
| Busan → Tokyo | 970 km |
| Busan → Buenos Aires | 19,347 km |
| Incheon → London | 8,878 km |
| Incheon → Los Angeles | 9,633 km |
| Incheon → Sydney | 8,294 km |
| Incheon → Paris | 8,986 km |
| Incheon → Tokyo | 1,178 km |
| Incheon → Buenos Aires | 19,462 km |
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