The flight distance from St Louis Regional Airport (ALN) in Alton/St Louis, United States to Cape Town International Airport (CPT) in Cape Town, South Africa is 13,773 kilometers (8,558 miles / 7,437 nautical miles). The estimated flight time for this route is approximately 17h, flying east southeast at a heading of 109°.

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 11:17 in Alton/St Louis, it's 19:17 in Cape Town. 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.

The return flight from Cape Town (CPT) to Alton/St Louis (ALN) follows a heading of 297° (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 St Louis Regional Airport (ALN) and Cape Town International Airport (CPT) detail pages, or use our flight duration calculator to compare other routes.