Have most people travelled to where they’re going by then or is it really busy? I’m on a translatlantic flight (Dublin - Chicago) on Dec 24th then another flight from Chicago to Cleveland. I’ve never travelled before on Christmas Eve so I’m wondering if it’s a good idea or not.
I flew from Atlanta GA to Boston MA on XMas Eve ten years ago. It seemed like a light travel day: the airport was quiet, I got checked in really quick, and the flight was about half-full (half empty?). The airline treated evryone really well - complimentary champagne and a surprisingly tasty turkey dinner with all the trimmings.
I flow Columbus to San Francisco last Christmas Eve, originally scheduled to go via Chicago, but they re-routed me through Phoenix because of delays in Chicago. However, my Phoenix-San Francisco flight was delayed, and I only just made it to the plane from San Francisco to Sydney (thereby avoiding spending Christmas Day in San Francisco, though my luggage did). My impression was that the airports were not much busier than usual.
If you see Bruce Willis anytime during traveling move quickly in the other direction. Unless the movies have lied to me I don’t think his xmas’s usually work out well 
It shouldn’t be too bad – since it’s a Monday in the middle of a 4-day weekend (for many), many people who are traveling for the holiday will have done so already.
No guarantees, of course …
In my experience, it can be somewhat busy but not much more than usual. This year, the timing is probably working out well because Christmas Eve is a Monday and many people will have the opportunity to travel over the weekend so it will spread out the crowds a bit. It gets worse on years when Christmas Eve is, for example, a Thursday and many people have to work on Wednesday so the travel crunch is more noticeable.
The thing that always struck me in the past was that many people are traveling with lots of gifts so everyone is at the absolute maximum for carry-on luggage and regular luggage which can add time and annoyance.
I took a flight out of O’hare last year on Christmas Eve, 6 or 7pm. By that time the place was empty, so no lines no waiting.
It depends on the day of the week the 24th falls on.
This year, it’s a Monday - so travel should be actually pretty light. Most people who were planning to travel for the holiday will have done so on Friday, Saturday or Sunday.
I did it once on a Saturday, and it was heinous beyond comprehension.
Ah grand so. I’ll have a relaxing trip then. I might even see Santa’s sleigh from the plane window. 
If Thanksgiving is any indicator, it’s nearly tomb-like. We breezed through security in five minutes.
Or his fighter-jet escort.
I’ve found that it can vary widely. It probably is dependant on what day of the week it falls on, as well as what time of day. I’ve seen extremely busy airports, and some that were completely dead. I have little recollection of empty seats on flights, though.
The biggest worry for me is that staff at the airport may have been at the eggnog just a wee bit early. One year I flew really early in the morning. It was the only plane to come in for hours. There were 16 passengers on it (it was one of those little puddle jumpers). Literally, the passengers on that flight and the people meeting them were the only people in the entire airport.
The airline lost the luggage of 12 passengers.
I took a trip early, early morning Christmas Day a couple years ago, like 5 am. It was a Sunday morning, and I had never seen an airport so utterly crowded before. That was a miserable day.