Norwegian Airlines has one way tickets for Los Angeles to London Gatwick LGW priced from $51 to $71 for travel departures October 2018 to March 2019. Ticket prices are much higher at $235 for LGW-LAX one way.
Lowest prices are winter 2019 dates. There are many other dates beginning in October at $71 one way.
Oakland to London Gatwick is priced at $160 to $180 one way during this time period.
Norwegian Airlines Los Angeles LAX – London Gatwick LGW nonstop