Are there nonstop flights from London (LHR) to Changchun (CGQ)?

No. The fastest connection is via Beijing, about 11h 44m of total flying time.

What is the fastest connection from London (LHR) to Changchun (CGQ)?

via Beijing ≈ 11h 44m, via Tianjin ≈ 11h 46m, via Seoul ≈ 12h 16m (estimated flying time, excluding layovers).

from 30,000 ANA miles (economy, one way, based on the published award charts).

London Heathrow Airport (LHR) to Changchun Longjia International Airport (CGQ)・8,206 km

No nonstop flights. The fastest connection is via Beijing (PKX), about 11h 44m of flying time (layover not included).

With milesANA 30,000 miles+ (via ICN)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

17 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.