Delta warns investors: 'It may be two years or more' for air travel recovery

Yet again, Delta Air Lines posted massive quarterly losses --- and the company is warning investors "it may be two years or more" for air travel demand to return to normal.

Delta warns investors: 'It may be two years or more' for air travel recovery
Yet again, Delta Air Lines posted massive quarterly losses --- and the company is warning investors "it may be two years or more" for air travel demand to return to normal.