Which airport code indicates Heathrow in London?

The airport code LHR is designated for Heathrow Airport in London, one of the busiest and largest airports in the world. Each airport has a unique three-letter code assigned by the International Civil Aviation Organization (ICAO) or the International Air Transport Association (IATA), and LHR is the IATA code specific to Heathrow. This code is widely recognized in the aviation industry and used in booking systems, flight itineraries, and airport signage.

The other codes: LGW refers to Gatwick Airport, which is another airport in London but not the same as Heathrow. LIT is the code for Bill and Hillary Clinton National Airport in Little Rock, Arkansas, and LBB represents Lubbock Preston Smith International Airport in Lubbock, Texas. These codes do not pertain to Heathrow and serve different geographical locations. Thus, LHR is clearly the appropriate and correct code for Heathrow Airport.