Most airlines offer the consumer the use of a credit card that they sponsor so that they can earn air miles for future travel.
Many people who travel on a constant basis and normally use the same airlines prefer to get their credit card from those airlines.
The problem arises when they need to use another airlines then the credit card will not help them get reservations or earn air miles.
When you plan on using the same airlines and you know that your route is pretty much routine using a credit card that is issued by those airlines is profitable because normally they will give you bonus air miles for free when you have spent so many miles in flight with their airlines.
You can get bonus air miles if you refer a friend and often your air miles add up so quickly that you can take a vacation bringing along a guest.
Some airlines offer to let your companion travel for free when you are using your air miles towards vacation.
There are many advantages by using the airline credit card of the airline of your choice.
When you need to travel by a variety of airlines making many trips in different places then you need to get your credit card from a lending institution that will give you air miles for free no matter what airline you are using.
You need to make sure that you have one of the major logos on your credit card and that the card can be used for more than just airline tickets.