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

Return flights

31 Jul - 14 Aug	Ryanair	direct
24 Jul - 14 Aug	Ryanair	direct
31 Jul - 03 Aug	Ryanair	direct
24 Jul - 03 Aug	Ryanair	direct
31 Jul - 10 Aug	Ryanair	direct
27 Jul - 14 Aug	Ryanair	direct
24 Jul - 10 Aug	Ryanair	direct
31 Jul - 21 Aug	Ryanair	direct
24 Jul - 27 Jul	Ryanair	direct
27 Jul - 03 Aug	Ryanair	direct
31 Jul - 07 Aug	Ryanair	direct
24 Jul - 31 Jul	Ryanair	direct
24 Jul - 25 Jul	Ryanair
27 Jul - 31 Jul	Ryanair	direct
23 Jul - 23 Jul	Austrian Airlines

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

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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Cheapest return flights from Klagenfurt to London in July from 91€

Return flights