The company lost $157 million in 1988, on revenues of $1.3 billion.
In the similar 1991 period, the company lost $253 million on 10.3 percent lower revenues of $2.9 billion.
American lost $185.3 million in the first half on revenues of $5.96 billion.
Last year, the company lost $458.9 million on revenues of $6.6 billion.
In 1986, United lost $80.6 million on revenues of $7.1 billion.
In the same period a year earlier, the airline lost $71.1 million on revenue of $1 billion.
For the six months ended June 30, the team said it lost $772,000 on revenues of $70.8 million.
In the corresponding period last year, the company lost $249,000 on revenues of just $652,000.
In 1998, the company lost $6.1 million on revenue of $1.25 billion, and more losses are expected this year.
It lost $139 million in its most recent fiscal year on revenues of $1.22 billion.