what county is heathrow airport in?
London
neutral
 London Heathrow is the busiest airport in Europe , with 73 @,@ 405 @,@ 330 counted passengers in 2014 , almost 10 million more than the second busiest , Paris @-@ Charles de Gaulle Airport . It is also the second busiest in the world when measured by international passengers , beaten only by Dubai International Airport . 

neutral
 Heathrow Airport , London 

entailment
 Several UK airports are within two hours ' drive of the town , including London Luton , East Midlands , Birmingham and London Stansted . Luton can be reached directly by train while East Midlands and Stansted can be reached by one change at Leicester . Sywell Aerodrome , located 5 miles northwest of Wellingborough , caters for private flying , flight training and corporate flights . 

contradiction
 London is a major international air transport hub with the busiest city airspace in the world . Eight airports use the word London in their name , but most traffic passes through six of these . London Heathrow Airport , in Hillingdon , West London , is the busiest airport in the world for international traffic , and is the major hub of the nation 's flag carrier , British Airways . In March 2008 its fifth terminal was opened . There were plans for a third runway and a sixth terminal ; however , these were cancelled by the Coalition Government on 12 May 2010 . 

entailment
 Heathrow is the largest airport in the country , handling over 67 million terminal passengers in 2006 , making it the third busiest airport in the world , and the busiest if measured by the number of international passengers . Nearly a third of all overseas residents visiting the UK enter the country via this airport , which also handles more than a fifth of all overseas visits by UK residents . Even though there are no dedicated freight services operating out of Heathrow , the practise of transporting cargo in the holds of passenger aircraft means that this airport still accounts for more than half of all freight handled by UK airports . Gatwick airport , with 34 million terminal passengers , is the second largest in the country , eighth busiest in the world for international passenger traffic , and lays claim to the busiest single runway airport in the world . Between them the five London airports handle nearly 137 million terminal passengers , 59 per cent of the national total . Stansted and East Midlands airports have both experienced large growth in freight handling over the past decade , and these two airports are the major hubs for express freight operations . 
