The flight distance from Chicago O'Hare International Airport (ORD) in Chicago, United States to Almirante Marco Andres Zar Airport (REL) in Rawson, Argentina is 9,739 kilometers (6,052 miles / 5,259 nautical miles). The estimated flight time for this route is approximately 12h, flying south southeast at a heading of 164°.

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 02:42 in Chicago, it's 05:42 in Rawson. The 3-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from Rawson (REL) to Chicago (ORD) follows a heading of 343° (north 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 Chicago O'Hare International Airport (ORD) and Almirante Marco Andres Zar Airport (REL) detail pages, or use our flight duration calculator to compare other routes.