Air passenger numbers rebound

Passenger numbers have bounced back to just 4% below levels seen soon ahead of the 11 September attacks on the US, the guide said.

Passenger numbers slipped sharply in the wake of the attacks with some airlines seeing their bookings reduced by up to 25% or 30%.

The industry's recovery hides some fundamental shifts that have taken place since last autumn.

Different responses

Low cost airlines responded to air passengers' confidence crisis by tempting them back onboard with extremely cheap offers.

Meanwhile, some of the industry's traditional leaders pulled back, cut costs, sacked staff and raised prices.

The result was a dramatic shift in the balance between the no-frills carriers and their larger counterparts.

After a few months, many low cost carriers had, in some cases, pushed national airlines out of the top spots in terms of both profitability and passenger numbers.

Airlines whose business depended heavily on routes across the Atlantic were hit the hardest, and passenger numbers on these routes remain low.

UK shrug it off

In terms of nationality, US airlines suffered the most.

Not all domestic markets saw passenger numbers fall.

In the UK, the number of domestic flights taken has actually risen since September last year.

International flights to and from the UK carry just 2% fewer passengers than they did ahead of the attacks.