Cheapest return flights from London to Keflavik in August from $254

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

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

Return flights

25 Aug - 30 Aug Icelandair direct
25 Aug - 07 Sep Icelandair direct
22 Aug - 04 Sep Icelandair direct
12 Aug - 16 Aug Icelandair direct
13 Aug - 23 Aug Icelandair direct
10 Aug - 13 Aug Icelandair direct
24 Aug - 27 Aug Icelandair direct
21 Aug - 24 Aug Icelandair direct
10 Aug - 14 Aug Icelandair direct
10 Aug - 16 Aug Icelandair direct
11 Aug - 16 Aug Icelandair direct
14 Aug - 23 Aug Icelandair direct
25 Aug - 01 Sep Icelandair direct
22 Aug - 01 Sep Icelandair direct
26 Aug - 01 Sep Icelandair direct
31 Aug - 05 Sep Icelandair direct
18 Aug - 01 Sep Norwegian Air Sweden AOC
29 Aug - 07 Sep Ryanair
25 Aug - 02 Sep airBaltic
18 Aug - 01 Sep Icelandair direct

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik