The flight distance from Incheon International Airport (ICN) in Seoul, South Korea to Marechal Cunha Machado International Airport (SLZ) in Sao Luis, Brazil is 16,021 kilometers (9,955 miles / 8,651 nautical miles). The estimated flight time for this route is approximately 20h, flying north northwest at a heading of 344°.

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 Brazil. It is an intercontinental flight between Asia and South America. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 15:19 in Seoul, it's 03:19 in Sao Luis. With a 12-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

The return flight from Sao Luis (SLZ) to Seoul (ICN) follows a heading of 13° (north northeast). 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 Marechal Cunha Machado International Airport (SLZ) detail pages, or use our flight duration calculator to compare other routes.