1.  Ticketless travel, which actually began several years ago, is spreading rapidly throughout the airline industry.

2.  And making ticketless travel more popular is important to cost-conscious Southwest.

3.  At Bush Intercontinental Airport this week, several passengers said they preferred ticketless travel.

4.  All ticketless travel trials so far have been for direct flights, with no change of planes or carriers.

5.  British Airways is debating whether to test ticketless travel on short domestic routes or on the hotly competitive transatlantic run.

6.  Despite its appeal and similarities with hotel and car reservations, ticketless travel is chosen by a minority of travelers.

7.  Houston-based Continental and Southwest require ticketless travel with the purchase of these discount fares.

8.  If you want to order tickets on line, or get confirmation numbers for ticketless travel, you have to give a credit card number.

9.  In any case several major European airlines are close to takeoff with what they call ticketless international travel.

10.  In January, it introduced ticketless travel.