Are there nonstop flights from London (STN) to Ankara (ESB)?

Yes. Pegasus Airlines, AJet fly this route. Flight time is about 3h 49m.

What is the fastest connection from London (STN) to Ankara (ESB)?

via Vienna ≈ 4h 18m, via Budapest ≈ 4h 18m, via Cologne ≈ 4h 19m (estimated flying time, excluding layovers).

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

London Stansted Airport (STN) to Esenboğa International Airport (ESB)・2,815 km

Nonstop flights available (2 airlines). Flight time about 3h 49m. Nonstop return flights also operate.

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

33 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.