Originally Posted by
Often1
Do not show up late for your scheduled flight unless you are prepared to pay for a new ticket or at best, a change fee ($200) + fare difference to next flight. A decent agent will rebook you. Another agent may not. And there may not be availability on that later flight, in which case you are SOL.
+1 especially on availability. While there isn't an official policy, I have had to do this on several occasions and have never had an issue with an agent not being willing to rebook me. I have however, more than once, had to fly standby and hope that a seat would open up (it did) as there was no availability.