11.   But analysts also say big airlines are struggling to maintain unit revenues in the face of plateauing traffic growth.

12.   But the two airlines struggled for years to make the partnership work, a challenge that they are expected to again face with Alitalia.

13.   By Saturday, plenty of bugs remained in flight schedules as Hartsfield and airlines struggled to find their rhythm again.

14.   Confusion and trepidation reigned for many travelers as airports and airlines struggled to put in place new federal security requirements.

15.   Midway Express Airlines of Milwaukee is cutting traditional pension benefits for flight attendants, and the major airlines are struggling with deficits in their pension programs.

16.   Most bargain airlines are struggling.

17.   Nonetheless, the airline is struggling.

18.   Other airlines are struggling with labor problems and economic uncertainty.

19.   Saddled with heavy debt and rising fuel and labor costs, airlines had been struggling with an economic downturn that drove companies to cut back on business travel.

20.   Since restructuring that August, the airline has struggled to cut costs and regain profitability.