Originally Posted by
BadgerFlyer91
For refundable tickets, if you don't check in and don't show, you get the fare back.
But for non-refundable, if you don't call in advance, you can lose the entire ticket price not just the change fee. I learned this the hard way.
This is the way I understand it as well. For non-refundable fares, you must cancel before departure to be able to use the credit (minus change fee) for one year.