Etihad fly ORD
nonstop daily on the 777-300ER. Fantastic airline - mega IFE options, yummy food, good crew. Abu Dhabi to downtown DXB
is under an hour by luxury coach and is free of charge (whereas you'll have to pay for a taxi from DXB
to get downtown - so in some ways AUH
makes more sense than flying to DXB
If you want to fly into DXB
, it has to be Delta. The new United is an awful mess, I just flew it and will avoid for a while to come, whereas Delta's contemporary product is very nice and consistent. United will give you an old 777-200ER but with Delta you'll probably get the top-of-the-range 777, the -200LR.
Finally, does it make sense to fly a domestic airline to one of Emirates' hubs in the US? JFK
(after Sep 12) all work for you, and there's YYZ
(guaranteed A380) as well.
Have a nice trip!
fly Saha Air 707s daily from Tehran's downtown Mehrabad to Mashhad, Kish Island and Ahwaz