Delta Air Lines and US Airways in the past week raised by $50 to $200 the change fee for domestic flights,

following a similar move by United Airlines. The carriers also have raised international change fees, generally by $50. US Airways now levies a $250 change fee for travel to and from Europe and the Middle East and $300 for travel to and from Brazil. Delta, meanwhile, indicated its international change fee now "is typically $250, but can vary based on location and type of fare," according to the carrier's website.