By the end of 1989 most domestic air service in the US was provided six surviving "legacy carriers."

None of the so-called legacy carriers have posted profits for the quarter.

Revenue management is also blamed for much of the financial difficulty currently experienced by legacy carriers.

But without a lot of notice, he added, the network carriers, which are also called legacy carriers, have "learned to fight back."

In order to qualify for a low round-trip airfare, some of legacy carriers require Saturday night to be spent at their destination.

Their commercial viability represented a serious competitive threat to the legacy carriers.

The extent of these pricing phenomena is strongest in "legacy" carriers.

The terminal was extensively renovated in 1958 and again in 1967, after which several legacy carriers resumed service.

With all fares initially set at $49, the airline was able to compete with legacy carriers.

After she retired from the Navy, she got a job at a legacy carrier and became one of the first female captains.