Low Interest Rate: The cost of credit is measured in terms of the annual percentage rate (APR). A good credit profile helps to obtain a low APR, i.e. prime + 4%. Most credit cards offer a ?variable rate? plan in which the APR changes with certain economic indicators. The interest rates vary with the cards and are influenced by other offerings such as the grace period, annual fee, bonus points, etc. A card holder who does not carry a monthly balance need not really worry about interest rates; however, people who do carry their balances forward can select from a number of airline credit cards that charge a low interest rate. Some cards offer an introductory rate of 0% interest on balance transfers over a period of time, which is typically 12 months.

Preset spending limit: The spending limit in airline credit cards can vary from a few hundred dollars to thousands of dollars. The minimum monthly payment is liable to increase with higher spending limits. Some cards allow users to spend over the credit limit, the amount over the limit and the resulting penalty are settled in the subsequent month?s payment. Credit card bills can quickly balloon to unmanageable proportions. Therefore, inveterate spenders are well-advised to carefully consider the preset spending limit before settling on an airline credit card.

Compatibility with other frequent-flyer programs: It is important to check whether an airline credit card offers this feature; portability of miles points is desirable as it allows one the freedom to use the services of more than one airline for redeeming the points. By not being tied down to one airline, users have an increased number of destinations to choose from. Bank-sponsored airline credit cards offer greater compatibility with other frequent-flyer programs as compared to airline-sponsored credit cards that usually focus on a single airline.

Annual fees: There are several airline credit cards that do not charge an annual fee. Non-airline credit cards that allow users to accumulate miles are usually fee-free. The purpose behind fees is to try and defray the costs of the free miles and other freebies. The average annual fee for airline credit cards is around $ 70. Frequent fliers stand to gain more by using cards that charge a fee because with these cards the airline miles benefits are more as compared to cards that are free. Moreover, if the card is used for business-related travel, the annual fee can also be tax deductible.