Are there nonstop flights from Geneva (GVA) to Skiathos (JSI)?

No. The fastest connection is via Milan, about 2h 54m of total flying time.

What is the fastest connection from Geneva (GVA) to Skiathos (JSI)?

via Milan ≈ 2h 54m, via Bari ≈ 2h 55m, via Venice ≈ 2h 56m (estimated flying time, excluding layovers).

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

Geneva International Airport (GVA) to Skiathos Island National Airport (JSI)・1,619 km

No nonstop flights. The fastest connection is via Milan (MXP), about 2h 54m of flying time (layover not included).

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

None.

26 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.