I was talking with a friend this morning about a long layover he had a few days ago. He was flying from Austin to Charlotte via DFW, in order to attend a family get-together. His American Airlines flight from DFW to Charlotte was cancelled, and he had to wait several hours for the next available seat.
The information in this well-done article at CreditCards.com would have helped him:
It’s good to read these tips, because everyone who flies will sometimes be in the same situation as my friend.