Are there nonstop flights from Feldkirchen bei Graz (GRZ) to Barcelona (BCN)?

No. The fastest connection is via Salzburg, about 2h 33m of total flying time.

What is the fastest connection from Feldkirchen bei Graz (GRZ) to Barcelona (BCN)?

via Salzburg ≈ 2h 33m, via Zurich ≈ 2h 37m, via Munich ≈ 2h 39m (estimated flying time, excluding layovers).

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

Graz Airport (GRZ) to Josep Tarradellas Barcelona-El Prat Airport (BCN)・1,237 km

No nonstop flights. The fastest connection is via Salzburg (SZG), about 2h 33m of flying time (layover not included).

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

None.

11 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.