Since Sept. 11, airlines have relied on secret knocks and passwords.

When it begins flying in a new city, the airline often relies on television commercials to woo prospective customers.

At the same time, the airlines can rely less on budget passengers, whose fares are sometimes so low that the carriers lose money on them.

But United said the schedule reductions would lead to savings of $1.2 billion because the airline would rely on more efficient aircraft.

Hoping to score points as the underdogs, the small airlines are relying on folksy appeal to rally support for the Senate tax.

In the past, the major airlines have relied on the military to provide more than 8 out of every 10 pilots hired.

The airline will rely on a pool of about 400 pilots and flight attendants for the first new flights.

That must also be why other major European airlines rely on Iberia to maintain and service their planes.

In the past all airlines have relied heavily on self-improvers working their way up through the system.

The airline is now relying mostly on its fleet of Boeing 737's, a much smaller plane.