If you've ever missed a flight, you know the panic that sets in as you watch the boarding process occur without you. You might rack your brain for ideas of how to get yourself on that plane, even if it means paying hundreds of dollars for a last-minute ticket. But what if there was another way? What if your airline had a policy in place that would guarantee you a seat on the next available flight home, free of charge? Even if you are flying on a basic economy or non-changeable ticket.... Believe it or not, many airlines do have such policies in place - and they can save the day if things don't go according to plan. Here's what you need to know about these "flat-tire policies" so you're prepared in case of a travel emergency.