how much money did airlines lose after 9/11?

Airlines lost an estimated $40 billion between 2001 and 2005 directly due to the impacts of the 9/11 attacks. In the immediate aftermath, U.S. domestic carriers saw their net income plummet by about $9.1 billion from the previous year. The industry's profitability was not restored until 2006 and 2007. The losses and financial strain led to multiple bankruptcies among major airlines and significant industry consolidation. Additionally, there was an estimated $1.1 billion loss specifically attributed to the decline in demand caused by post-9/11 security measures such as baggage screening. Overall, the terrorist attacks caused severe financial damage to airlines, accelerated bankruptcies, and reshaped the industry landscape for years afterward.