I often fly on Christmas, and it's predictably a breeze. Wasn't sure what to expect this year, though, flying Christmas Eve. Turns out it's pretty similar. Got to SJC this morning expecting it to be reasonably busy, but there were 0 lines at check-in or at security. My SJC-LAX flight was 98% full, though. Hoping my next flights will be full enough that they'll move me up to E+.