United, Lufthansa, Air Canada, Austrian and Norse Atlantic have round-trip flights from Los Angeles (LAX) to London, United Kingdom (LHR) for $512-$552, NONSTOP or with connections. Flights September to October. Very few extended weekends available.
Flights via United/Lufthansa require an overnight stay in Munich on the return flight. Norse is a basic carrier that charges additional fees for carry-on bags and meal service. It is more expensive than the other airlines after fees.
Click for more details and booking links Cheap Flights: Los Angeles to London, United Kingdom $512-$552 r/t [September-October] – United / Lufthansa / Air Canada / Austrian / Norse