Southwest lets you (anyone, not just people with lots of miles) cancel up to 10 minutes before the flight time and you get all of your fare back as a credit you

Southwest lets you (anyone, not just people with lots of miles) cancel up to 10 minutes before the flight time and you get all of your fare back as a credit you can use for your next purchase with no extra fee. A great feature and one of the many reasons I usually fly with Southwest. Wish other airlines did the same.