The flight distance from Jeju International Airport (CJU) in Jeju City, South Korea to Denver International Airport (DEN) in Denver, United States is 10,311 kilometers (6,407 miles / 5,567 nautical miles). The estimated flight time for this route is approximately 13h, flying northeast at a heading of 37°.

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 05:09 in Jeju City, it's 14:09 in Denver. 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 5,316 feet between the two airports. Denver International Airport sits higher than Jeju International Airport. Travelers arriving at the higher-elevation airport should be aware of potential altitude effects.

The return flight from Denver (DEN) to Jeju City (CJU) follows a heading of 319° (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 Jeju International Airport (CJU) and Denver International Airport (DEN) detail pages, or use our flight duration calculator to compare other routes.