Which mileage credits cards would be best for a person who is a frequent flyer?

The Citi Platinum Select / AAdvantage Visa Signature is the best card for those flying with American Airlines, offering 30,000 bonus miles when the user spends $1000 within the first 3 months. It rewards 2 miles for each dollar spent on American Airlines, and 1 mile for every other dollar spent. When redeeming miles each month, a further 10%, up to 10,000 bonus miles each year, can be redeemed. There are also numerous other benefits, and the $95 annual fee is waived for the first 12 months of use.