Terracentric said: "Another alternative is to see a matinee on Mon, 12/26, or Wed, 12/28. I've never seen two shows in one day so I'm not sure if I'd want to do that."
Two-show days are never about desire. When I lived in California, I did them to maximize my time. When I moved to NYC, I almost never did them. And now that I'm 90-120 minutes outside of NYC, I do them again. This past weekend, I saw Color Purple and Fiddler on the Roof, which was a pretty intense day. I'd recommend making sure the shows on a two-show day are different. A play and a musical. A fun time and a serious turn. Or at least a one-act and a two-act. I also spend the time after the first show (if I'm in town alone and not hanging out with someone), really reflecting on the first show, reviewing the Playbill, and locking in the experience, so that it doesn't blur into the second experience, or get shut out.
But if I had to pick between a two-show day or a frantic airport race that may not end well, it's really no contest.