London Heathrow Airport had the highest proportion of international travellers last year, according to the Civil Aviation Authority (CAA).
Some 55 per cent of passengers passing through Heathrow last year were non-UK residents, compared to 39 per cent at Stansted Airport.
The figures have been published as part of the CAA 2007 Air Passenger Survey, released earlier this week.
Humberside had the lowest proportion of non-UK residents passing through it, at just four per cent.
London's airports also had the highest proportion of public transport usage. At Heathrow, 38 per cent of passengers used public transport on their journey last year.
Business passengers passing through Heathrow also had the highest average individual income compared to other airports, at £83,000.
Earlier this year, Heathrow was the first airport in Europe to start using a new runway debris detection system.
The new technology was developed by QinetiQ and uses two radar scanners to scan the entire 3,658 metre runway area for 24 hours every day.
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