The flight distance from London Heathrow Airport (LHR) in London, United Kingdom to Valle Del Conlara International Airport (RLO) in Merlo, Argentina is 11,254 kilometers (6,993 miles / 6,077 nautical miles). The estimated flight time for this route is approximately 14h, flying southwest at a heading of 231°.

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

Time zone information: When it's 00:03 in London, it's 20:03 in Merlo. The 4-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

There is a significant elevation difference of 1,938 feet between the two airports. Valle Del Conlara International Airport sits higher than London Heathrow Airport.

The return flight from Merlo (RLO) to London (LHR) follows a heading of 35° (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 London Heathrow Airport (LHR) and Valle Del Conlara International Airport (RLO) detail pages, or use our flight duration calculator to compare other routes.