on Thursday in trimming its profit estimates as costs rise.

The airline said it expects to report adjusted per-share earnings of between $1.85 and $2.05, down from an earlier forecast of $2.20 to $2.50. Delta said it is paying more for fuel than previously expected this quarter, but added that maintenance costs were also more than it anticipated.

Delta forecast unit revenue would fall between 2% and 3% in the third quarter from last year, better than the previous estimate that sales could drop as much as 4%. The company also reiterated its estimate for full-year adjusted earnings of $6 to $7 a share.

The company trimmed its quarterly guidance as the industry faces increased expenses just as it enters a period of lower travel demand.

, and warned Wednesday that higher costs would cut into their profits in the summer quarter. Their lowered outlooks followed similar guidance from and .

Delta shares were down 1% in morning trading Thursday.