Are there nonstop flights from Reykjavík (KEF) to San José (SJO)?

No. The fastest connection is via Miami, about 10h 3m of total flying time.

What is the fastest connection from Reykjavík (KEF) to San José (SJO)?

via Miami ≈ 10h 3m, via New York ≈ 10h 5m, via Newark ≈ 10h 6m (estimated flying time, excluding layovers).

from 35,000 ANA miles, from 45,000 JAL miles (economy, one way, based on the published award charts).

Keflavik International Airport (KEF) to Juan Santamaría International Airport (SJO)・7,652 km

No nonstop flights. The fastest connection is via Miami (MIA), about 10h 3m of flying time (layover not included).

With milesANA 35,000 miles+ (via EWR)JAL 45,000 miles+ (via LHR)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

17 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.