Cheapest return flights from London to Keflavik in August from $243

Best time to book flights for London (LHR) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from London (LHR) to Keflavik (KEF) in August 2025 (see full year).

Return flights

29 Aug - 01 Sep Scandinavian Airlines
07 Aug - 12 Aug Scandinavian Airlines
07 Aug - 10 Aug Scandinavian Airlines
18 Aug - 27 Aug Scandinavian Airlines
17 Aug - 26 Aug Scandinavian Airlines
07 Aug - 11 Aug Scandinavian Airlines
23 Aug - 27 Aug Icelandair direct
18 Aug - 27 Aug Icelandair direct
30 Aug - 03 Sep Icelandair direct
30 Aug - 14 Sep Icelandair direct
20 Aug - 04 Sep Icelandair direct
07 Aug - 13 Aug Scandinavian Airlines
29 Aug - 02 Sep Scandinavian Airlines
23 Aug - 31 Aug Icelandair direct
25 Aug - 31 Aug Icelandair direct
31 Aug - 07 Sep Icelandair direct
30 Aug - 07 Sep Icelandair direct
29 Aug - 07 Sep Icelandair direct
29 Aug - 01 Sep Icelandair direct
28 Aug - 01 Sep Icelandair direct

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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