The flight distance from St Louis Regional Airport (ALN) in Alton/St Louis, United States to Jomo Kenyatta International Airport (NBO) in Nairobi, Kenya is 13,216 kilometers (8,212 miles / 7,136 nautical miles). The estimated flight time for this route is approximately 17h, flying east northeast at a heading of 66°.

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 Kenya. 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 10:05 in Alton/St Louis, it's 19:05 in Nairobi. 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 4,787 feet between the two airports. Jomo Kenyatta International Airport sits higher than St Louis Regional Airport. Travelers arriving at the higher-elevation airport should be aware of potential altitude effects.

The return flight from Nairobi (NBO) to Alton/St Louis (ALN) follows a heading of 315° (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 St Louis Regional Airport (ALN) and Jomo Kenyatta International Airport (NBO) detail pages, or use our flight duration calculator to compare other routes.