You probably have a short list of favorite airlines for free award flights. That’s all well and good, but it pays to have a cursory knowledge of a lot of different programs. That way, when the time is right, you’ll be ready to take advantage of terrific deals that will help you travel the globe. If you don’t know about Flying Blue and its monthly Promo Awards, which offer up to 50 percent off award flights, you need to read this article.