Distance guide covering 16+ routes across 2 cities in South Korea. Includes domestic and international connections with flight times and driving distances.
South Korea is home to 2 major cities in our database, including Seoul, Busan. The largest city by population is Seoul with approximately 9,776,000 residents, located in the Capital Area region.
Within South Korea, there is 1 domestic route connecting cities across the country. The shortest domestic route is Busan to Seoul at 325 km, while the longest is Busan to Seoul at 325 km.
South Korea also connects to 15 international destinations worldwide. Whether you're planning domestic travel or international flights, this comprehensive distance guide provides all the information you need. All distances are calculated using the Haversine formula for maximum accuracy.
For travelers within South Korea, shorter routes under 500 km are often well-suited for driving or train travel. Routes between 500-2,000 km offer a choice between driving and flying, while anything over 2,000 km is typically best served by air travel. Read our guide on estimating travel time for more detailed planning advice.
1 route connecting cities within South Korea, from 325 km to 325 km.
15 routes connecting South Korea to cities worldwide, from 215 km to 4,672 km.
South Korea's aviation and ground network shapes how the 16 routes on this page actually feel in practice. The flag carrier Korean Air handles most long-haul departures, while low-cost players such as Jeju Air, Jin Air, T'way dominate short-haul leisure traffic. The primary international gateway is Seoul Incheon (ICN), which also acts as the natural connection point for travelers using one-stop routings to save 20–40% on long-haul fares.
For shorter trips, ground transport in South Korea is built around Korail KTX high-speed services connecting Seoul with Busan in 2h 15min. On corridors under roughly 700 km, door-to-door rail travel is often faster than flying once airport security and transfers are factored in — a calculation worth running before booking domestic flights inside South Korea.
Of the 16 routes covered here, the breakdown is 2 under 500 km, 10 between 500 and 1,500 km, 4 between 1,500 and 5,000 km. That mix is why a single travel-time rule never works for South Korea: a typical traveler will encounter everything from a 60-minute regional hop to a multi-hour long-haul journey, depending on destination.
The 2 cities in our database for South Korea are anchored by Seoul — a metropolitan area of roughly 9.78 million people sitting at 37.57°N, 126.98°E. That position places much of South Korea in a temperate climate with four distinct seasons, which directly influences both the local travel calendar and how comfortable arrivals from very different latitudes will feel.
Domestic distances within South Korea range from Busan to Seoul at 325 km up to Busan to Seoul at 325 km. The wider that range, the more critical it becomes to match transport mode to journey length — exactly what the routes table above is designed to help with.
Because of Earth's curvature, the great-circle distances shown on this page are not the same as flight paths drawn on a flat map. Routes between South Korea and far-away destinations often track closer to the poles than people expect — read more in our guide on how the Haversine formula works.
Travel costs in South Korea sit in the mid-range globally, with significant savings available 6–10 weeks ahead of departure.
Mid-week departures (Tuesday and Wednesday in particular) into and out of South Korea are typically 20–30% cheaper than Friday and Sunday flights on the same routes. Red-eye and very early-morning departures usually save another 10–15%. Budget carriers serving South Korea apply strict carry-on rules and unbundled fares, so packing light remains the single biggest lever for keeping total trip cost low.
For multi-city trips inside South Korea, compare the cost of a single open-jaw flight plus ground transport against multiple point-to-point flights — on routes with strong rail service, the rail-and-fly combination usually wins on both price and total door-to-door time.
Under 500 km: ground transport — driving, coaches, or the rail services described above — is usually competitive with flying door-to-door once airport overhead is included. This band covers many of the shortest routes on this page.
500–1,500 km: the choice gets interesting. In South Korea, the high-speed rail network often beats flying door-to-door even at the upper end of this band, particularly if you can travel city-centre to city-centre.
Over 1,500 km: flying becomes the obvious choice. The 15 international routes from South Korea above 1,500 km on this page are essentially flight-only journeys; ground alternatives exist only on a handful of specialist sleeper trains or long-distance coaches and aren't time-competitive.
Whichever mode you pick, use the calculator on this site to confirm exact great-circle figures, then add 20–40% for actual driving distance and 30–60 minutes per direction for airport overhead. Browse our travel guides for in-depth advice on flight time, driving distance and trip planning across South Korea and beyond.
We cover 2 cities in South Korea, including Seoul, Busan.
The longest domestic route is Busan to Seoul at 325 km.
There are 15 international routes connecting cities in South Korea to destinations worldwide. The shortest international route is Busan to Fukuoka at 215 km.
All distances use the Haversine formula for great-circle distance — the shortest path between two points on Earth. Flight times assume 800 km/h cruising speed plus 30 minutes for takeoff/landing. Driving times use 80 km/h average with a 30% road routing factor.