Cheapest return flights from London to Keflavik in September from $216

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

Return flights

01 Sep - 15 Sep British Airways direct
30 Sep - 06 Oct Scandinavian Airlines
03 Sep - 12 Sep Scandinavian Airlines
10 Sep - 15 Sep Scandinavian Airlines
10 Sep - 15 Sep British Airways direct
09 Sep - 16 Sep SWISS
15 Sep - 23 Sep Austrian Airlines
11 Sep - 15 Sep British Airways direct
28 Sep - 07 Oct Icelandair direct
05 Sep - 12 Sep Scandinavian Airlines
12 Sep - 19 Sep Scandinavian Airlines
03 Sep - 10 Sep Scandinavian Airlines
30 Sep - 06 Oct Icelandair direct
29 Sep - 08 Oct Icelandair direct
25 Sep - 03 Oct Austrian Airlines
25 Sep - 03 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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