USAir: So I can buy a one way ticket MIA to CLT for ~$350. I can buy a one way to MIA to LGA which stops in CLT for $140. What are the consequences of buying the MiA/LgA ticket and getting off in CLT? Also, I have all day and would rather do accumulate milage than just go to CLT. What is the best method to determine possible mileage runs? For instance, I can go MiA to DfW (again, through my home base, CLT, for ~$240) but can't figure out how to get back to CLT for less than $360. Thanks in advance for any guidance!