United Airlines is threatening massive employee layoffs, furloughs or pay cuts if Congress doesn't pass a coronavirus economic relief package by the end of this month.

The air travel industry is suffering enormous financial losses because of the coronavirus outbreak as governments and businesses around the world restrict travel.

Thursday, the Transportation Security Administration reported screening the fewest number of airline passengers ever. Only about 624,000 people passed through airport security checkpoints, compared to 2.4 million people on the same day last year.

In response, airlines are cutting most of their flights and parking many of their planes, while waiting for travel demand to recover.

United has already eliminated 60% of its flights and put a freeze on hiring, while slashing capital spending, cutting payments to vendors and contractors and chopping executive salaries in half.