He warned that airlines would cannibalize their existing businesses if they flew discount carriers on similar routes.

Today, the rules for flying on most international routes are set by bilateral government agreements.

That might not have been the case if low-fare airlines were flying on international routes.

They will be the roomiest planes flown on domestic routes, according to a Qantas spokesman.

It flew on Soviet and Russian regional routes until July 1998.

Even at the beginning of this decade, airlines routinely flew wide-body jumbo jets on such routes.

They have to fly only on specified routes.

There could be financial incentives, or "buy two fares, get the third one free," or a sharp discount for flying on major routes.

In other words, American was willing to earn less than it would have by flying its planes on other routes.

Passengers flying on southbound routes, where most of the hijackings occur, will have their luggage searched before they board.