Are there nonstop flights from Santander (SDR) to Athens (ATH)?

No. The fastest connection is via Barcelona, about 3h 52m of total flying time.

What is the fastest connection from Santander (SDR) to Athens (ATH)?

via Barcelona ≈ 3h 52m, via Tirana ≈ 3h 54m, via Bologna ≈ 3h 57m (estimated flying time, excluding layovers).

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

Seve Ballesteros-Santander Airport (SDR) to Athens Eleftherios Venizelos International Airport (ATH)・2,407 km

No nonstop flights. The fastest connection is via Barcelona (BCN), about 3h 52m of flying time (layover not included).

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

None.

21 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.