I was originally booked today on an AA DCA-JFK Flight which was cancelled (no explanation given but assume weather) yesterday. I called the ExPlat line and got rebooked on US Airways Shuttle from DCA-LGA around the same time as my original flight. We took off on-time but when we got close to LGA the captain announced that the plane would have to hold in the air while they waited for the runway to clear of ice. After 40 minutes circling the captain returned and said LGA was reporting at least another hour wait in the air and the plane didn't have enough fuel. So we were being diverted - back to DCA. I got rebooked for later flights that kept getting cancelled, so I gave up and took the train instead. My US Airways flight officially appears as "cancelled" even though we took off. Is there any chance I would get credit for the flight? How about the RT ?