Are there nonstop flights from Jacksonville (JAX) to Reykjavík (KEF)?

No. The fastest connection is via Newark, about 7h 28m of total flying time.

What is the fastest connection from Jacksonville (JAX) to Reykjavík (KEF)?

via Newark ≈ 7h 28m, via New York ≈ 7h 28m, via Raleigh/Durham ≈ 7h 28m (estimated flying time, excluding layovers).

from 27,500 ANA miles (economy, one way, based on the published award charts).

Jacksonville International Airport (JAX) to Keflavik International Airport (KEF)・5,498 km

No nonstop flights. The fastest connection is via Newark (EWR), about 7h 28m of flying time (layover not included).

With milesANA 27,500 miles+ (via EWR)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

14 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.