I checked the Skyteam lounge finder page online and this came up under SEA (along with the Delta Sky Club, of course):

British Airways Lounge “S” Satellite Top floor by S10 Gate 09:30 - 12:30 on Sunday, Monday, Tuesday, Thursday and Friday

Is this a typo? I'm flying DL to SEA and then KE to ICN in November and wonder if I can get access to the BA club. Anyone had such experience?