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

Return flights

30 Aug - 10 Sep	Wizz Air Malta
31 Aug - 09 Sep	Wizz Air Malta
29 Aug - 09 Sep	Wizz Air Malta
31 Aug - 08 Sep	Wizz Air Malta
31 Aug - 07 Sep	Wizz Air Malta
28 Aug - 03 Sep	Wizz Air Malta
27 Aug - 02 Sep	Norwegian
28 Aug - 02 Sep	Wizz Air Malta
30 Aug - 03 Sep	Ryanair
29 Aug - 09 Sep	Icelandair	direct
20 Aug - 23 Aug	Ryanair
22 Aug - 26 Aug	Ryanair
13 Aug - 19 Aug	Ryanair
28 Aug - 30 Aug	Wizz Air Malta
21 Aug - 24 Aug	Ryanair
25 Aug - 30 Aug	Ryanair
26 Aug - 30 Aug	Ryanair
16 Aug - 24 Aug	Ryanair
26 Aug - 28 Aug	Ryanair
25 Aug - 28 Aug	Ryanair

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

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 London to Keflavik in August from 189€

Return flights