Cheapest return flights from London to Keflavik in September from 204€

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

Return flights

24 Sep - 02 Oct British Airways direct
15 Sep - 23 Sep SWISS
26 Sep - 02 Oct British Airways direct
18 Sep - 22 Sep Scandinavian Airlines
12 Sep - 15 Sep Scandinavian Airlines
11 Sep - 21 Sep Scandinavian Airlines
25 Sep - 01 Oct Icelandair direct
20 Sep - 30 Sep Icelandair direct
11 Sep - 22 Sep Scandinavian Airlines
11 Sep - 15 Sep Scandinavian Airlines
24 Sep - 01 Oct Icelandair direct
11 Sep - 23 Sep Lufthansa
05 Sep - 15 Sep British Airways
23 Sep - 30 Sep Icelandair direct
24 Sep - 03 Oct British Airways direct
27 Sep - 06 Oct Icelandair direct
26 Sep - 05 Oct British Airways direct
26 Sep - 04 Oct British Airways
30 Sep - 05 Oct Icelandair direct
27 Sep - 05 Oct Icelandair direct

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

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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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