The flight distance from Robert Gray Army Air Field (GRK) in Fort Cavazos (Killeen), United States to King Khaled International Airport (RUH) in Riyadh, Saudi Arabia is 12,727 kilometers (7,908 miles / 6,872 nautical miles). The estimated flight time for this route is approximately 16h, flying northeast at a heading of 35°.

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 Saudi Arabia. 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 08:54 in Fort Cavazos (Killeen), it's 17:54 in Riyadh. 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 1,034 feet between the two airports. King Khaled International Airport sits higher than Robert Gray Army Air Field.

The return flight from Riyadh (RUH) to Fort Cavazos (Killeen) (GRK) follows a heading of 327° (north 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 King Khaled International Airport (RUH) detail pages, or use our flight duration calculator to compare other routes.