If you fly a lot you will probably want to have an Airline Credit Card. As you spend with Airline Credit Cards you can earn airline mileage credits. Look for Airline Credit Cards that offer no limits on the miles you can earn and miles don't expire for the life of the account. Also not only earn Frequent Flyer miles per dollar spent on purchases, but also redeem hotel stays, car rentals, cruises and more! Not every Airline Credit Card will allow you to do this. Also make sure they have No blackout dates, even during holidays. Airline Credit Cards are not for individuals that carry a balance because interest rates tend to be quite high.