16JUL16 Update ? UNITED W16 International Operation Changes :: Routesonline
Newark – Dublin 29OCT16 – 08MAR17 Service operates 1 daily instead of 2 daily, however operational aircraft switches from 757 to 767-400ER (777-200ER from 19DEC16 to 15FEB17 and from 28FEB17-8MAR17)
Note it was x1 daily last winter, second only added after EI announced daily EWR service.
IAD looks more less the same as last winter.
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Emirates will use a 2 class B77W from 1st January on EK 163/164
2 class was heavily used before the second daily was added so no surprise they plan to return it for the evening flight.