Judging by the new round of airline fees, probably not much!
Southwest Airlines opted not to charge for carry-ons (other airlines opted out too), but then announced it was doubling the fees it charges unaccompanied kids to fly.
There has always been a fee for “UM’s aka/Unaccompanied Minors, as they’re called in the biz, but Southwest’s jump from $25.00 to $50.00 each way says a lot about the “fee-madness" that has infected airlines everywhere,