Enter the holiday travel season with the understanding it’s going to be chaotic and possibly filled with problems. Accept this is the case and choose to willingly travel despite this. It puts you in a much better position to handle the lines and the delays.
Check the flight prices from differing airports that you can fly to. For example, in New York City, it might be cheaper to fly from Newark over JFK. In the UK, for example, you might find flights to and from Manchester are cheaper than in London.