I searched the remaining weekends of the year for run availability. Granted, I searched for ORD - IAD - LHR - ORD - SFO, but, the basic framework is still the same, and you should be able to find deals for your city, or, at least back to ORD. Fares without the West Coast attachment general run 20 bucks cheaper. Essentially, YMMV. As well, if you do not find the deal the first time, search and click again. They've been known to pop in and out erratically.

Weekend of:

Sept Weekends: Nada
October Weekends: Zilch
Nov 1: 253
Nov 8: 243
Nov 15: 243
Nov 22: 243
Nov 29: You don't want to know
Dec 6: 243
Dec 13: 243
Dec 20: Hell, no.
Dec 27: Absolutely not.

Good luck! PM me if anyone needs any help . . . .