The flight distance from Robert Gray Army Air Field (GRK) in Fort Cavazos (Killeen), United States to O. R. Tambo International Airport (JNB) in Johannesburg, South Africa is 14,770 kilometers (9,177 miles / 7,975 nautical miles). The estimated flight time for this route is approximately 18h, flying east at a heading of 98°.

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 09:50 in Fort Cavazos (Killeen), it's 17:50 in Johannesburg. With a 8-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 4,543 feet between the two airports. O. R. Tambo International Airport sits higher than Robert Gray Army Air Field. Travelers arriving at the higher-elevation airport should be aware of potential altitude effects.

The return flight from Johannesburg (JNB) to Fort Cavazos (Killeen) (GRK) follows a heading of 289° (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 Robert Gray Army Air Field (GRK) and O. R. Tambo International Airport (JNB) detail pages, or use our flight duration calculator to compare other routes.