The flight distance from Harry Reid International Airport (LAS) in Las Vegas, United States to Libertador Gral D Jose De San Martin Airport (PSS) in Posadas, Argentina is 9,390 kilometers (5,835 miles / 5,070 nautical miles). The estimated flight time for this route is approximately 12h, flying southeast at a heading of 130°.

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

Time zone information: When it's 05:29 in Las Vegas, it's 10:29 in Posadas. The 5-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

There is a significant elevation difference of 1,751 feet between the two airports. Libertador Gral D Jose De San Martin Airport sits lower than Harry Reid International Airport.

The return flight from Posadas (PSS) to Las Vegas (LAS) follows a heading of 316° (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 Harry Reid International Airport (LAS) and Libertador Gral D Jose De San Martin Airport (PSS) detail pages, or use our flight duration calculator to compare other routes.