- They fly out of Oakland airport, OAK, not San Francisco Airport.
- They don't fly non-stop to Oslo, apparently. Itineraries to Oslo from OAK connect in London, Gatwick.
- OAK<->LGW September 18th - 24th indeed $499
- OAK<->LGW July 3rd - 10th $1,189. So you'll still want to buy tickets well in advance.