OK Princess, but a couple of caveats regarding SW:

1. I think it's for trips, not segments. I.e., if you take trip to LAX, it probably stops in PHX. On a major, that's another segment. On SW, I think it's just the trip that counts, not how many segments it takes. I'm willing to be corrected on this, but that's my understanding.

2. The SW credits evaporate after a year. I have a friend who uses SW a bit, but the rolling one-year window keeps eliminating his older credits before he gets enough to use, so it does him no good.