Join Date: Apr 2009
Location: Bye Delta
Programs: AA EXP, UA Silver, HH Diamond, IHG Plat, Hyatt Plat, Marriott Titanium, Nat'l EE, Avis PC, Hertz PC
Posts: 16,630
The O in ORC stands for Original, so that would be SJC-SLC. The alternative is your actually flown segment SFO-SLC.
No, it is not an IDB unless you present yourself for boarding and you are turned away because the flight is oversold.