Airline coupons come in all shapes and sizes. Virtually every airline engages in some form of couponing. Airline coupons come from shopping malls with a minimum purchase of merchandise, they come in the mail together with takeout Chinese restaurant menus, they show up in credit card bills, they appear in clothing catalogs, city tourism offices send them out with packets of brochures, and you'll often find them with frequent flyer materials. Sometimes, when the airline discount coupon comes with a purchase of a low-cost item, it is worth more than the item itself. The discounts are normally excellent, providing transportation for far less than advance purchase tickets.
Coupons are like found money.
And if you know how to squeeze the most from them the bargains can get even better. Here's the best part. So, if you have a coupon on airline A but prefer to fly on airline B, you can almost always use one airline's coupon on a competing airline. You just have to ask. Call your preferred airline and ask them if they will honor another airline's coupon.