London Heathrow International Airport, or LHR, is the second busiest airport in Europe and the seventh busiest in the world. Located in Longford TW6, United Kingdom, London Heathrow is a major hub for both domestic and international air travel. The airport is named after the nearby hamlet of Heathrow, which was located in the parish of Harmondsworth, Middlesex, during the 1930s. The hamlet was named after the grassy heath where it was located, which was historically used for grazing livestock.

The airport originally opened in 1929 as London Airport, and was used primarily as a private airport for the British royal family. In the following decades, the airport was used for commercial flights, and by 1944 it was the busiest airport in the world. In 1966, the airport was renamed Heathrow Airport, and in 1975 it was officially designated as London Heathrow International Airport.

The airport code LHR was determined by the International Air Transport Association (IATA), which assigns a three-letter code to airports around the world. The code is typically based on the airport’s name or location. In this case, the code LHR was derived from the airport’s name – London Heathrow.

London Heathrow handles over 1,300 flights a day, making it one of the busiest airports in the world. The airport is served by a number of airlines, including British Airways, Lufthansa, Virgin Atlantic, Air France, KLM, Aer Lingus, Emirates, Qatar Airways, and many more.

London Heathrow is an important hub for international air travel, and it continues to grow and evolve in order to meet the needs of its passengers. The airport is an integral part of the British travel and tourism industry, and has become a symbol of the United Kingdom’s status as a global leader in aviation.