If you want to change your tickets on United Airlines, it will start to cost you more.
The airline has increased its domestic and Canadian destination change fee to $200 from $150 on its cheapest tickets. On South American routes the fee goes from $250 to $300. For Asia and Europe, it stays at $250.
So far, all of the other major airlines have stayed at $150 but only time will tell if they too increase their fees. Southwest doesn’t charge a ticket change fee.
Addendum: 4/24/13—US Airways has raised their fees to match United.