My Southwest flight from SD to Houston today got cancelled at the last minute. In fact, I just found out online 5 minutes before I was going to head out the door. I was supposed to be there by 10:30am and although they're putting me on a non-stop later flight, I still won't get there until 4pm this afternoon. I'm beyond pissed off because I'll miss a conference for work and now I have to notify everyone involved... all at the last minute. Now that I have 7 hours to kill, I'm just wondering if I can get at least some compensation from Southwest (i.e. a voucher) for my inconvenience? I mean I understand they wouldn't cancel it if they could've helped it, but it has also completely screwed up my travel plans... Any opinions will be appreciated.