Are there nonstop flights from Kailua-Kona (KOA) to Barcelona (BCN)?

No. The fastest connection is via Seattle, about 16h 21m of total flying time.

What is the fastest connection from Kailua-Kona (KOA) to Barcelona (BCN)?

via Seattle ≈ 16h 21m, via Calgary ≈ 16h 23m, via San Francisco ≈ 16h 46m (estimated flying time, excluding layovers).

from 35,000 ANA miles, from 47,000 JAL miles (economy, one way, based on the published award charts).

Ellison Onizuka Kona International Airport at Keāhole (KOA) to Josep Tarradellas Barcelona-El Prat Airport (BCN)・12,863 km

No nonstop flights. The fastest connection is via Seattle (SEA), about 16h 21m of flying time (layover not included).

With milesANA 35,000 miles+ (via SFO)JAL 47,000 miles+ (via DFW)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

6 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.