Holiday Business Travel
If you are planning to travel in the US for business during the Christmas holidays, my advice is don’t, if you can help it.
However if you have to, it may be best to avoid Chicago, New York, Philly and San Francisco, if possible, says the Air Transport Association
Also:
Book accommodation early
Get to the airport early
Consider secondary airports that may not be as congested
If driving, take back roads
Consider trains