So much for that fees chart. Delta Airlines announced late last week that they will begin charging fees when you cash in frequent flier miles for free tickets. The fuel surcharge for SkyMiles program is $25 on roundtrip domestic flights and $50 on international. Not an original idea, of course. US Airways got the frequent flier fee ball rolling last month with charges ranging from $25-$50 to redeem miles. I guess free is not really free.