In Memoriam, FlyerTalk Evangelist
Join Date: Jul 2002
Location: Durham, NC (RDU/GSO/CLT)
Programs: AA EXP/MM, DL GM, UA Platinum, HH DIA, Hyatt Explorist, IHG Platinum, Marriott Titanium, Hertz PC
Posts: 33,856
I would go with IAD-ORD.
I've had two flights take off from PHX and divert back there. One went all the way to San Diego, couldn't land, and came back. The other took off and landed back there five minutes later.
Neither flight is entered on Flight Memory.