US Airways was actually the first airline to charge $25 dollars for checking one bag, but they offered a $5 dollar discount if you prepaid online. No more. They’ve joined the rest of the big legacy airlines (except American which still charges $20 dollars) in charging $25 dollars for the first bag, with only a $2 dollar discount for prepaying online. United does not offer a discount for prepaying online. We can only assume that American will join the other airlines in short order. $60 dollars each way if you check 2 bags. Wow!
Southwest should have some fun with this one.