Catrina Smith is sure that the $2,231 she paid for her flight upgrade from Prague to Madrid was an Iberia error. Here is why.

An Iberia error cost me $2,231. Help!

Catrina Smith is sure that the $2,231 she paid for her flight upgrade from Prague to Madrid was an Iberia error. After all, an unrestricted business class ticket booked at the last minute costs less than one-third as much — roughly $630. Something is wrong, she says.