IATA Code: LHR ICAO Code: EGLL Contact E-Mail: heathrow@flyane.com London Heathrow Airport or Heathrow (IATA: LHR, ICAO: EGLL), located in the London Borough of Hillingdon, is the largest and busiest airport in the United Kingdom. It is the world's second busiest airport in terms of total passenger traffic and it handles more international passengers than any other airport in the world. It is also the busiest airport in the European Union in terms of passenger traffic and the second busiest in terms of traffic movements. The airport is owned and operated by BAA, which also owns and operates five other UK airports.