Why pay hundreds of dollars for a plane ticket if you do not have to? There are many credit cards that offer tons of frequent flyer miles just for signing up (and sometimes meeting a spending threshold). Even after the annual fees that are common in these days, travelers still come out far ahead with these credit cards. Airline-specific cards 1. American Express Gold Delta Skymiles This card awards 20,000 bonus miles after your first purchase. You can add up to two additional card holders for an extra bonus of 2500 miles per approved cardholder. The $95 annual fee waived the