Cheapest return flights from London to Keflavik in September from $219

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

Return flights

30 Sep - 05 Oct Scandinavian Airlines
18 Sep - 30 Sep British Airways direct
03 Sep - 17 Sep Scandinavian Airlines
03 Sep - 10 Sep Scandinavian Airlines
09 Sep - 14 Sep Scandinavian Airlines
13 Sep - 16 Sep British Airways direct
11 Sep - 15 Sep Scandinavian Airlines
02 Sep - 19 Sep Scandinavian Airlines
01 Sep - 07 Sep Scandinavian Airlines
09 Sep - 12 Sep Scandinavian Airlines
01 Sep - 12 Sep Scandinavian Airlines
27 Sep - 03 Oct Austrian Airlines
26 Sep - 03 Oct Scandinavian Airlines

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

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