Southwest does change flights. They just changed the time of my flight from Albany, NY from 7:15am to 9:00 am, not a big deal but a change nonetheless. The thing I HATE about Southwest flights is their "No Assigned Seats" system, and not so much for the system, but for the way people use it. I fly Southwest often and I always checkin exactly 24 hours to get a good line number. Once on the plane my wife and I take two seats next to each other in the first available row. We are THE ONLY ONES WHO DO THIS! Nearly every other couple will take either the window and aisle seat of a three seat row, or the aisle and middle seat. They do this until the plane stops boarding, (assuming it is not full), in the hopes that no one will sit in the third seat. This is VERY RUDE and makes single passengers uncomfortable about taking the available seat. If the plane is close to, or entirely, full, and somebody has to use every seat, the couple will then slide over to the window and middle seat. Sometimes I feel like just sitting between the two people in the middle seat, and then when they say "oh, we'll move over", just saying, "no thanks, I like the middle seat" and plopping down.