Are there nonstop flights from Luton (LTN) to Rijeka (RJK)?

No. The fastest connection is via Zurich, about 2h 34m of total flying time.

What is the fastest connection from Luton (LTN) to Rijeka (RJK)?

via Zurich ≈ 2h 34m, via Munich ≈ 2h 36m, via Split ≈ 3h 5m (estimated flying time, excluding layovers).

London Luton Airport (LTN) to Rijeka Airport (RJK)・1,322 km

No nonstop flights. The fastest connection is via Zurich (ZRH), about 2h 34m of flying time (layover not included).

None.

8 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.