I bought a ticket at the gate about 2 hours after the original flight was scheduled to depart. My original CO flight was delayed thanks to Air Force one taking off, then we lost our landing slot. By the time our new slot was ready Chicago was shut down for wind. So they canceled the flight. I walked over to the Southwest gates and they have 3 flights waiting. I buy a ticket on the last plane and got a A pass and took off an hour later.