Are there nonstop flights from Glasgow (GLA) to Stuttgart (STR)?

No. The fastest connection is via Amsterdam, about 2h 27m of total flying time.

What is the fastest connection from Glasgow (GLA) to Stuttgart (STR)?

via Amsterdam ≈ 2h 27m, via Frankfurt am Main ≈ 2h 27m, via London ≈ 2h 32m (estimated flying time, excluding layovers).

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

Glasgow Airport (GLA) to Stuttgart Airport (STR)・1,221 km

No nonstop flights. The fastest connection is via Amsterdam (AMS), about 2h 27m of flying time (layover not included).

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

None.

14 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.