Cheapest return flights from London to Keflavik in September from 178€

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

Return flights

08 Sep - 15 Sep British Airways direct
25 Sep - 29 Sep British Airways direct
10 Sep - 12 Sep Scandinavian Airlines
22 Sep - 03 Oct Austrian Airlines
26 Sep - 29 Sep British Airways direct
11 Sep - 15 Sep British Airways direct
09 Sep - 16 Sep SWISS
26 Sep - 05 Oct Icelandair direct
16 Sep - 29 Sep British Airways direct
18 Sep - 03 Oct Austrian Airlines
06 Sep - 16 Sep British Airways direct
18 Sep - 21 Sep Austrian Airlines
18 Sep - 21 Sep Icelandair direct
25 Sep - 05 Oct Icelandair direct
27 Sep - 07 Oct Icelandair direct
23 Sep - 01 Oct Icelandair direct
24 Sep - 02 Oct Icelandair direct
25 Sep - 08 Oct Icelandair direct
25 Sep - 04 Oct Icelandair direct
01 Sep - 09 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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