Air transport in the United Kingdom is the commercial carriage of passengers, freight and mail by aircraft, both within the United Kingdom and worldwide. In the past 25 years the industry has seen continuous growth, and the demand for passenger air travel in particular is forecast to increase from the current level of 236 million passengers to 465 million in 2030.

London Heathrow Airport and London Gatwick Airport are amongst the top ten busiest airports in the world. More than half of all passengers travelling by air in the UK currently travel via the five London area airports, though regional airports have experienced the most growth in recent years, due to the success of 'no-frills' airlines over the last decade.

The majority of all passengers travelling by air to or from the UK are carried by UK airlines, of which there are around forty, and at the end of 2006 the UK air transport fleet numbered 963 aircraft, flying just under 1.2 million flights and averaging over eight hours of flying daily. Together the two largest airlines as measured by passenger numbers; British Airways and easyJet, account for nearly half of the 127 million passengers flown on UK airlines.

In terms of capacity, both available and used, British Airways is again the largest airline, whilst easyJet is pushed into third place by Virgin Atlantic Airways. British Airways passenger flights also account for over 50 per cent of all cargo carried by UK airlines, and when combined with its cargo operations the airline carries over 60 per cent of all cargo carried by UK airlines.

This is a list of all the Airports in the United Kingdom: