What's interesting, too, is that no airline added the surcharge for 13 days. Instead, for example, American added it for 3 days and then US Airways added it for a different 6 days and then American Airlines added 4 more dates. Then they just matched each other's fees and spread the wealth, so to speak. Remember, the $10 surcharge is each way. And holiday airfares are already among the highest the airlines charge, so this just adds the cherry on top. For them.