Are there nonstop flights from Stockholm (ARN) to Stuttgart (STR)?

Yes. Eurowings fly this route. Flight time is about 2h 5m.

What is the fastest connection from Stockholm (ARN) to Stuttgart (STR)?

via Copenhagen ≈ 2h 36m, via Berlin ≈ 2h 36m, via Hamburg ≈ 2h 37m (estimated flying time, excluding layovers).

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

Stockholm-Arlanda Airport (ARN) to Stuttgart Airport (STR)・1,341 km

Nonstop flights available (1 airline). Flight time about 2h 5m. Nonstop return flights also operate.

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

37 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.