The flight distance from Johnson County Airport (BYG) in Buffalo, United States to Incheon International Airport (ICN) in Seoul, South Korea is 9,462 kilometers (5,880 miles / 5,109 nautical miles). The estimated flight time for this route is approximately 12h, flying northwest at a heading of 320°.

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

Time zone information: When it's 22:30 in Buffalo, it's 13:30 in Seoul. With a 15-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 4,947 feet between the two airports. Incheon International Airport sits lower than Johnson County Airport.

The return flight from Seoul (ICN) to Buffalo (BYG) follows a heading of 35° (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 Johnson County Airport (BYG) and Incheon International Airport (ICN) detail pages, or use our flight duration calculator to compare other routes.