Originally Posted by
cmhua777
Of the three, IAD is the least prone to bad weather that leads to a disaster.
The next consideration would be seat arrangements. The 787 is 2-3-2 in PE while the 767 is 2-2-2. Not sure the size of your family, but one configuration may be better than the other.
Finally, the noon-ish flights from IAH-EWR/IAD are widebodies. They are less prone to delays/cancellations and a more comfortable ride (though they don’t sell PE seats officially on those legs).
As a curve ball, United will sell you IAH-Frankfurt/Munich-CDG. I prefer the longer flights over the water so that I can rest and be ready on arrival. Those international flights are also very unlikely to be cancelled, even in bad weather.
From Houston during Thanksgiving, taking IAH-FRA/MUC-CDG would be my first choice by far. Get across the Atlantic and avoid IAD/EWR/ORD altogether. If you want to fly on a 787, the go with IAD. Of the 3 it will be the least annoying experience.