Cheapest return flights from London to Keflavik in September from $258

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

Return flights

09 Sep - 15 Sep SWISS
18 Sep - 22 Sep easyJet
18 Sep - 21 Sep Icelandair direct
24 Sep - 09 Oct Icelandair direct
15 Sep - 21 Sep Icelandair direct
17 Sep - 22 Sep Icelandair direct
16 Sep - 23 Sep Icelandair direct
01 Sep - 06 Sep Icelandair direct
23 Sep - 30 Sep Icelandair direct
22 Sep - 29 Sep Icelandair direct
09 Sep - 13 Sep Icelandair direct
30 Sep - 11 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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