Cheapest return flights from London to Keflavik in August from $423

AirHint found the following cheapest return flights from London (LCY) to Keflavik (KEF) in August 2026 (see full year).

Return flights

23 Aug - 03 Sep KLM
23 Aug - 30 Aug KLM
23 Aug - 26 Aug KLM
27 Aug - 31 Aug KLM
19 Aug - 25 Aug SWISS
17 Aug - 25 Aug SWISS
28 Aug - 03 Sep SWISS
19 Aug - 26 Aug KLM
05 Aug - 12 Aug KLM
23 Aug - 28 Aug KLM
19 Aug - 30 Aug KLM
28 Aug - 01 Sep SWISS
20 Aug - 25 Aug SWISS
26 Aug - 02 Sep KLM
25 Aug - 01 Sep KLM
29 Aug - 01 Sep KLM
22 Aug - 05 Sep SWISS

Also check the deals for one-way flights from London to Keflavik in August.

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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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