Are there nonstop flights from London (LHR) to Kos (KGS)?

No. The fastest connection is via Luxembourg, about 4h 11m of total flying time.

What is the fastest connection from London (LHR) to Kos (KGS)?

via Luxembourg ≈ 4h 11m, via Venice ≈ 4h 11m, via Stuttgart ≈ 4h 11m (estimated flying time, excluding layovers).

from 15,000 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

London Heathrow Airport (LHR) to Kos International Airport "Ippokratis" (KGS)・2,711 km

No nonstop flights. The fastest connection is via Luxembourg (LUX), about 4h 11m of flying time (layover not included).

With milesANA 15,000 miles+ (via BRU)JAL 23,000 miles+ (via HEL)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

40 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.