Are there nonstop flights from London (LHR) to Guangzhou (CAN)?

Yes. China Southern Airlines fly this route. Flight time is about 11h 40m.

What is the fastest connection from London (LHR) to Guangzhou (CAN)?

via Chongqing ≈ 12h 11m, via Amsterdam ≈ 12h 11m, via Chengdu ≈ 12h 12m (estimated flying time, excluding layovers).

from 25,000 ANA miles, from 40,000 JAL miles (economy, one way, based on the published award charts).

London Heathrow Airport (LHR) to Guangzhou Baiyun International Airport (CAN)・9,496 km

Nonstop flights available (1 airline). Flight time about 11h 40m. Nonstop return flights also operate.

With milesANA 25,000 miles+ (via HND)JAL 40,000 miles+ (via HKG)Economy, one way, estimate. Tap a connection for miles by cabin.

51 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.