The flight distance from Harrismith Airport (HRS) in Harrismith, South Africa to Seattle-Tacoma International Airport (SEA) in Seattle, United States is 16,753 kilometers (10,410 miles / 9,046 nautical miles). The estimated flight time for this route is approximately 21h, flying northwest at a heading of 319°.

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 South Africa with United States. It is an intercontinental flight between Africa and North America. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 15:13 in Harrismith, it's 05:13 in Seattle. With a 10-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 5,153 feet between the two airports. Seattle-Tacoma International Airport sits lower than Harrismith Airport. Travelers arriving at the higher-elevation airport should be aware of potential altitude effects.

The return flight from Seattle (SEA) to Harrismith (HRS) follows a heading of 59° (east 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 Harrismith Airport (HRS) and Seattle-Tacoma International Airport (SEA) detail pages, or use our flight duration calculator to compare other routes.