11.   Airlines make the unpublished fares available through their own Web sites, discount travel agencies, and, increasingly, Priceline.

12.   Airlines make most of their money from business travelers.

13.   Airlines make the most money off last-minute tickets predominantly purchased by business.

14.   Airlines will make you check anything bigger as regular luggage.

15.   Airlines are making it easier to get to the slopes this season.

16.   Airlines do not make decisions on super-cheap packages until they see how regular business is for that weekend.

17.   Airlines make their money on business travelers and the expensive, last-minute tickets they buy.

18.   Alliances appear to be prospering now because airlines are making money, Turnbull said.

19.   Brokers also worry about how their operations will be affected by changes most airlines are making to their frequent flier programs starting next year.

20.   Business-class and first-class seats are where the airlines make most of their money and where they try to attract their most loyal customers.