Fly nonstop from Los Angeles to London for $539 round-trip on British Airways.
Depart LAX on Sunday, March 18, return from LHR on Monday, March 26.
Other dates are also available for travel in February/March, with slightly higher fares ($543) in April. You'll find other carriers are matching, including American, Virgin Atlantic, and United.
Slightly lower fares are available on Norwegian to London Gatwick, though keep in mind that Norwegian charges for baggage ($45 per segment).
See our Los Angeles LAX fare listings for a complete look at current fares.
Looking for a hotel in London? Here's what's available for the above dates on Hotelwatchdog.