61.   But he and other analysts fret that union leaders at those three major airlines will strongly resist abandoning old contract formulas.

62.   But in December, amid the spate of cancellations, the company was last among major airlines in on-time performance.

63.   But in an interview on Friday, Bethune worried that several major airlines might go bankrupt if Congress did not act soon.

64.   But if the major airlines hold firm on the plan travel agents will have to scramble to make up for lost revenue since many operate on slim profit margins.

65.   But most major airlines already have them on most of their planes.

66.   But other major airlines declined to participate, according to people familiar with their decisions.

67.   But that is only a sprinkling of the hundreds of heavily discounted E-fare flights available each week from the major airlines.

68.   But the department has never used these powers against a major airline for competing unfairly, choosing instead to pressure carriers behind the scenes.

69.   But the last major airline strike involving an emergency board showed the limitations of presidential power.

70.   But the odds of dying in a commuter plane are only slightly worse than in a major airline jet, aviation experts say.