Cheapest return flights from London to Klagenfurt in September from $59

AirHint found the following cheapest return flights from London (LON) to Klagenfurt (KLU) in September 2025 (see full year).

Return flights

25 Sep - 12 Oct Ryanair direct
25 Sep - 02 Oct Ryanair direct
18 Sep - 02 Oct Ryanair direct
18 Sep - 28 Sep Ryanair direct
25 Sep - 09 Oct Ryanair direct
28 Sep - 16 Oct Ryanair direct
28 Sep - 12 Oct Ryanair direct
28 Sep - 02 Oct Ryanair direct
18 Sep - 21 Sep Ryanair direct
28 Sep - 09 Oct Ryanair direct
21 Sep - 02 Oct Ryanair direct
21 Sep - 25 Sep Ryanair direct
24 Sep - 28 Sep Ryanair
21 Sep - 28 Sep Ryanair direct
28 Sep - 05 Oct Ryanair direct
22 Sep - 25 Sep Ryanair
23 Sep - 25 Sep Ryanair
18 Sep - 23 Sep Ryanair
25 Sep - 27 Sep Ryanair
24 Sep - 26 Sep Ryanair

Also check the deals for one-way flights from London to Klagenfurt in September.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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