Cheapest return flights from London to Keflavik in August from $406

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

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

Return flights

31 Aug - 05 Sep British Airways
22 Aug - 01 Sep British Airways
22 Aug - 27 Aug KLM
22 Aug - 25 Aug KLM
25 Aug - 29 Aug KLM
20 Aug - 25 Aug KLM
17 Aug - 25 Aug KLM
16 Aug - 25 Aug KLM
29 Aug - 03 Sep British Airways
29 Aug - 01 Sep British Airways
08 Aug - 17 Aug KLM
13 Aug - 20 Aug British Airways
15 Aug - 25 Aug KLM
15 Aug - 20 Aug KLM
31 Aug - 04 Sep KLM
31 Aug - 07 Sep KLM
29 Aug - 12 Sep KLM
21 Aug - 02 Sep KLM
28 Aug - 05 Sep KLM
25 Aug - 05 Sep Lufthansa

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

Skyscanner

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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