Cheapest return flights from London to Keflavik in September from 252€

AirHint found the following cheapest return flights from London (LCY) to Keflavik (KEF) in September 2026 (see full year).

Return flights

13 Sep - 16 Sep KLM
30 Sep - 08 Oct KLM
10 Sep - 20 Sep KLM
24 Sep - 27 Sep KLM
16 Sep - 20 Sep KLM
03 Sep - 08 Sep Lufthansa
18 Sep - 28 Sep KLM
25 Sep - 05 Oct KLM
18 Sep - 25 Sep KLM
25 Sep - 28 Sep KLM
12 Sep - 23 Sep KLM
21 Sep - 28 Sep KLM
26 Sep - 09 Oct KLM
25 Sep - 03 Oct KLM

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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