Are there nonstop flights from Osaka (KIX) to London (LGW)?

No. The fastest connection is via Helsinki, about 12h 17m of total flying time.

What is the fastest connection from Osaka (KIX) to London (LGW)?

via Helsinki ≈ 12h 17m, via Amsterdam ≈ 12h 18m, via Beijing ≈ 12h 40m (estimated flying time, excluding layovers).

from 31,000 ANA miles, from 45,000 JAL miles (economy, one way, based on the published award charts).

Kansai International Airport (KIX) to London Gatwick Airport (LGW)・9,550 km

No nonstop flights. The fastest connection is via Helsinki (HEL), about 12h 17m of flying time (layover not included).

With milesANA 31,000 miles+ (via PEK)JAL 45,000 miles+ (via CDG)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

16 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.