Are there nonstop flights from London (LHR) to Stuttgart (STR)?

Yes. Eurowings fly this route. Flight time is about 1h 23m.

What is the fastest connection from London (LHR) to Stuttgart (STR)?

via Frankfurt am Main ≈ 1h 57m, via Amsterdam ≈ 2h 2m, via Zurich ≈ 2h 6m (estimated flying time, excluding layovers).

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

London Heathrow Airport (LHR) to Stuttgart Airport (STR)・756 km

Nonstop flights available (1 airline). Flight time about 1h 23m. Nonstop return flights also operate.

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

16 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.