American 9.8%
United 7.7%
Northwest 6.9%
Continental 5.8%
TWA 5.7%
Delta 5.4%
Southwest 4.9%
US Airways 4.9%
(Source: "Kiplinger's")
Note the spread between the most and least generous airlines.
The article is available online at:
http://www.kiplinger.com/magazine/?a...y/FREQUENT.HTM