In addition to wide open availability for British Airways $555 LAX-London summer 2017 economy tickets, there are more Oneworld Alliance fare deals for summer travel to London, Paris and Copenhagen from Boston, Fort Lauderdale and Los Angeles. British Airways Boston to London LHR is pricing $463 round trip for July 2017 departures. Fort Lauderdale offers both London $568 and Paris on sale with American Airlines in summer 2017 connecting through Charlotte CLT and other AA hubs for transatlantic flights.
There is also another low summer 2017 fare from British Airways Los Angeles to Copenhagen, Denmark for $581 round trip.
These fares are available beginning late November and through end of schedule with wide open availability for June to August 2017 departures. Low fares appear to require 7-day minimum stay.
British Airways Boston BOS – London LHR nonstop
American Airlines – British Airways Expedia ticket for Oneworld Alliance coded flights Fort Lauderdale to London LHR
$518.12 round trip Fort Lauderdale FLL – Charlotte CLT – London LHR – FLL
Thu June 29 – Sat July 8
American Airlines Fort Lauderdale – Paris CDG
British Airways Los Angeles LAX – Copenhagen CPH
My post from earlier today: