Here are authentic premium economy class flights with British Airways World Traveller Plus on 787-900 aircraft on flights from San Jose SJC to London LHR for discount destinations beyond the UK, like Dublin, Paris and Milan under $900 round trip.
Low fare departure dates are primarily April and May before resuming in mid-August.
Ticket prices for British Airways Premium Economy flights are about $100 lower flying out of San Jose SJC compared to SFO or LAX. I searched several of these ticket prices through AARP discount booking page, but came up with same Premium Economy prices as shown on Google Flight searches.
My previous article today about Delta Premium Economy $790-$900 low fares educated me to the fact that Delta currently offers a substandard Premium Economy class of service product on most aircraft.
British Airways San Jose – London LHR
B787-900 Premium Economy cabin (SeatGuru.com)
British Airways Premium Economy on this route is 2-3-2.
Londonspotter.co.uk describes the seat experience in this article about the BA787-900.
British Airways Premium Economy $898.40 SJC to Dublin
San Jose SJC – London LHR – Dublin DUB – London LHR – SJC
British Airways Premium Economy $894.68 SJC to Paris
San Jose SJC – London LHR – Paris CDG – London LHR – SJC
British Airways Premium Economy $893.73 SJC to Milan
San Jose SJC – London LHR – Milan MXP – London LHR – SJC