I have flown twice on Christmas day. The first was on a Midwest Express DC-9-30 from SAT to MCI. I had the whole back of the plane to myself, whilst the first three to four rows were full. The turbulence was so bad over OKC that we were bouncing like a basketball the whole way. It felt like the basketball had been bounced by a person at least 25 feet tall. The second time was on an AA MD-83 from ONT to DFW and the plane was full with the exception of the seat on the two side next to me. One of the best flights I had and they did not even try to fill the seat with somebody else.