How To Get FREE Airline Gift Cards

One of the benefits is a $100 airline credit each calendar year! 

Okay, here's one to put on your to do list before the end of the year. If you have the American Express Premier Rewards Credit Card, you can get FREE gift cards on the airline of your choice. One of the benefits of the Premier Rewards card is $100 airline fee credit each calendar year.
This fee can be used for incidentals like baggage and other fees. However, you may be able to get credit for buying gift cards online.
So it may be worth a try.
Here's how you do it. Before you buy anything, you need to log into your American Express account, click on benefits and link the card to the airline of your choice.
I picked Southwest Airlines, but there are dozens of airlines to choose from.
Then wait a few days for the link to go through.
This is important. The first gift card I bought did not credit. The second one though posted a credit within a few days.
Then log into your chosen airline account and buy the gift card using your Premier Rewards Credit Card. I recommend buying the gift cards in small amounts i.e. $25, $40. Then within a few days, you should see a credit posted to your account.
Nice!