Are there nonstop flights from Istanbul (SAW) to London (LHR)?

No. The fastest connection is via Munich, about 4h of total flying time.

What is the fastest connection from Istanbul (SAW) to London (LHR)?

via Munich ≈ 4h, via Belgrade ≈ 4h, via Frankfurt am Main ≈ 4h (estimated flying time, excluding layovers).

Istanbul Sabiha Gökçen International Airport (SAW) to London Heathrow Airport (LHR)・2,551 km

No nonstop flights. The fastest connection is via Munich (MUC), about 4h of flying time (layover not included).

None.

53 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.