我觉得aa的好，black out dates少，很容易订上32500单程的回国机票，而且还包括在
美国国内的转机
s**c 发帖数: 34339
5
个人觉得AA好
b*****u 发帖数: 1339
6
有free都很好。
c**2 发帖数: 8496
7
my experience: AA is best to fly Europe (20K miles one way)
For China, AA/UA/CO are the same.
I am now trying to use southwest miles for domestic flight (after learning
that SW mile expire date cannot be extended).
