SUCH is the state of air travel these days that even the fees have fees.
It is a ritual that will most likely sound familiar to many holiday travellers: Your plans suddenly change, and a flight must be switched. Soon you are paying a flight-change fee of US$200 or so. But so extreme have these airline change fees become that a cottage industry has emerged offering a way for travellers to avoid the charge - for a fee, of course. And even the airlines are getting in on the act.
It is part of what has become a booming business for the carriers. Altogether, change fees generated US$2.98 billion for the domestic airlines in 2014, triple the amount in 2007, when most fees were introduced, according...