The flight distance from Denver International Airport (DEN) in Denver, United States to Port St Johns Airport (JOH) in Port St Johns, South Africa is 15,827 kilometers (9,834 miles / 8,546 nautical miles). The estimated flight time for this route is approximately 20h, flying east at a heading of 92°.

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

Time zone information: When it's 20:24 in Denver, it's 05:24 in Port St Johns. With a 9-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 4,207 feet between the two airports. Port St Johns Airport sits lower than Denver International Airport. Travelers arriving at the higher-elevation airport should be aware of potential altitude effects.

The return flight from Port St Johns (JOH) to Denver (DEN) follows a heading of 296° (west 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 Denver International Airport (DEN) and Port St Johns Airport (JOH) detail pages, or use our flight duration calculator to compare other routes.