As an American Duxford would be really good as it has a very very strong US content, partly because this area of UK (East Anglia , the area north and east of London) was home to the 8th AirForce in WW2 and there are still US bases in area today.
If you can make the trip out, fast trains to Cambridge from Kings Cross station take an hour and then a taxi is best but do check opening times. Christmas is a much bigger deal in Uk than the USA and lots of places close on additional days.
i wish you good luck with the weather too
PB