The flight distance from King Khaled International Airport (RUH) in Riyadh, Saudi Arabia to St Louis Lambert International Airport (STL) in St Louis, United States is 11,641 kilometers (7,233 miles / 6,286 nautical miles). The estimated flight time for this route is approximately 15h, flying north northwest at a heading of 327°.

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 Saudi Arabia 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 15:01 in Riyadh, it's 07:01 in St Louis. 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 1,432 feet between the two airports. St Louis Lambert International Airport sits lower than King Khaled International Airport.

The return flight from St Louis (STL) to Riyadh (RUH) follows a heading of 40° (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 King Khaled International Airport (RUH) and St Louis Lambert International Airport (STL) detail pages, or use our flight duration calculator to compare other routes.