Are there nonstop flights from Luton (LTN) to Klagenfurt am Wörthersee (KLU)?

No. The fastest connection is via Rome, about 3h 24m of total flying time.

What is the fastest connection from Luton (LTN) to Klagenfurt am Wörthersee (KLU)?

via Rome ≈ 3h 24m, via Palma de Mallorca ≈ 4h 5m (estimated flying time, excluding layovers).

London Luton Airport (LTN) to Klagenfurt Airport (KLU)・1,212 km

No nonstop flights. The fastest connection is via Rome (FCO), about 3h 24m of flying time (layover not included).

None.

2 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.