The flight distance from Libertador Gral D Jose De San Martin Airport (PSS) in Posadas, Argentina to Seattle-Tacoma International Airport (SEA) in Seattle, United States is 10,633 kilometers (6,607 miles / 5,741 nautical miles). The estimated flight time for this route is approximately 14h, flying northwest at a heading of 322°.

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

Time zone information: When it's 10:44 in Posadas, it's 06:44 in Seattle. The 4-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from Seattle (SEA) to Posadas (PSS) follows a heading of 125° (southeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Libertador Gral D Jose De San Martin Airport (PSS) and Seattle-Tacoma International Airport (SEA) detail pages, or use our flight duration calculator to compare other routes.