Are there nonstop flights from Kolkata (CCU) to London (LGW)?

No. The fastest connection is via Amritsar, about 10h 25m of total flying time.

What is the fastest connection from Kolkata (CCU) to London (LGW)?

via Amritsar ≈ 10h 25m, via Ahmedabad ≈ 10h 57m, via Dubai ≈ 11h 24m (estimated flying time, excluding layovers).

from 29,500 ANA miles, from 37,000 JAL miles (economy, one way, based on the published award charts).

Netaji Subhash Chandra Bose International Airport (CCU) to London Gatwick Airport (LGW)・7,974 km

No nonstop flights. The fastest connection is via Amritsar (ATQ), about 10h 25m of flying time (layover not included).

With milesANA 29,500 miles+ (via SIN)JAL 37,000 miles+ (via DXB)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

10 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.