Are there nonstop flights from Reykjavík (KEF) to Billund (BLL)?

Yes. Icelandair fly this route. Flight time is about 2h 49m.

What is the fastest connection from Reykjavík (KEF) to Billund (BLL)?

via Vágar ≈ 3h 19m, via Bergen ≈ 3h 24m, via Edinburgh ≈ 3h 33m (estimated flying time, excluding layovers).

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

Keflavik International Airport (KEF) to Billund Airport (BLL)・1,968 km

Nonstop flights available (1 airline). Flight time about 2h 49m. Nonstop return flights also operate.

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

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.