Are there nonstop flights from London (LGW) to San Diego (SAN)?

No. The fastest connection is via Montréal, about 11h 49m of total flying time.

What is the fastest connection from London (LGW) to San Diego (SAN)?

via Montréal ≈ 11h 49m, via Toronto ≈ 11h 50m, via Amsterdam ≈ 12h 2m (estimated flying time, excluding layovers).

from 40,000 JAL miles (economy, one way, based on the published award charts).

London Gatwick Airport (LGW) to San Diego International Airport (SAN)・8,845 km

No nonstop flights. The fastest connection is via Montréal (YUL), about 11h 49m of flying time (layover not included).

With milesJAL 40,000 miles+ (via MCO)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

8 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.