My prediction I would buy tickets from California to Amsterdam on British Airways Nov 16 came true two days early when Oneworld put Amsterdam, France, Italy and Germany on sale again for around $400 round trip this morning for winter travel from November through March 2018.
I paid $416 each for tickets from San Jose SJC to Amsterdam using British Airways AARP discount link. Hotels already booked last weekend when these tickets were on sale for the same prices as today, then increased to $800s these past three days.
Oneworld Posted Fares LAX, SFO, SJC to Europe
(AARP discount reduces many of these fares by $35 to $65)
There are several more cities on sale in France, Germany and Italy.
British Airways AARP discount ticket
San Francisco SFO – London LHR – Venice VCE – London LHR – SFO