The flight distance from Incheon International Airport (ICN) in Seoul, South Korea to Black Hills-Clyde Ice Field (SPF) in Spearfish, United States is 9,599 kilometers (5,965 miles / 5,183 nautical miles). The estimated flight time for this route is approximately 12h, flying north northeast at a heading of 33°.

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

This is an international route connecting South Korea with United States. It is an intercontinental flight between Asia and North America. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 05:39 in Seoul, it's 13:39 in Spearfish. With a 16-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

There is a significant elevation difference of 3,910 feet between the two airports. Black Hills-Clyde Ice Field sits higher than Incheon International Airport.

The return flight from Spearfish (SPF) to Seoul (ICN) follows a heading of 322° (northwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Incheon International Airport (ICN) and Black Hills-Clyde Ice Field (SPF) detail pages, or use our flight duration calculator to compare other routes.