They've had these odd LIS/OPO/KEF stopover options on SFO-LHR routes for cheap biz (~$2,600) on for a while now, I don't quite get it honestly. I wonder if the LIS/OPO is because TAP is planning on flying LIS-SFO next year, and KEF maybe to put pressure on icelandic and wow? though those two don't really compete in biz, i don't get it...