The Wall Street Journal said American plans to send non-disclosure agreements to other airlines as soon as this month.
In a letter Tuesday to employees, AMR Chief Executive Tom Horton said the company is close to having "greater clarity on our revenue outlook and cost structure" so it "now makes sense to evaluate a range of strategic options, including potential mergers ... . We will be reaching out to interested parties to inform them how we intend to proceed."
Horton and other executives are said to be looking at the merits and downsides of merging with US Airways, JetBlue, Alaska Air, Virgin America or Frontier Airlines, the newspaper reported.
Only US Airways has expressed public interest in a deal with AMR, the Journal said. US Airways said it was "pleased that a process appears to be under way."