Cheapest return flights from London to Keflavik in September from 184€

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

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

Return flights

14 Sep - 17 Sep British Airways
18 Sep - 02 Oct British Airways direct
28 Sep - 08 Oct British Airways direct
14 Sep - 24 Sep British Airways direct
07 Sep - 18 Sep British Airways direct
07 Sep - 14 Sep British Airways direct
08 Sep - 12 Sep Scandinavian Airlines
28 Sep - 04 Oct British Airways direct
15 Sep - 24 Sep Scandinavian Airlines
20 Sep - 03 Oct Icelandair direct
28 Sep - 03 Oct British Airways direct
19 Sep - 04 Oct Icelandair direct
17 Sep - 30 Sep Scandinavian Airlines
11 Sep - 17 Sep British Airways direct
23 Sep - 03 Oct Icelandair direct
25 Sep - 05 Oct Icelandair direct
27 Sep - 04 Oct Icelandair direct
26 Sep - 04 Oct Icelandair direct
11 Sep - 14 Sep British Airways direct
13 Sep - 27 Sep 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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