Cheapest return flights from London to Keflavik in September from $149

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

Return flights

30 Sep - 03 Oct easyJet
30 Sep - 10 Oct easyJet
30 Sep - 13 Oct easyJet
17 Sep - 30 Sep Icelandair direct
23 Sep - 30 Sep Icelandair direct
22 Sep - 25 Sep Icelandair direct
16 Sep - 23 Sep Icelandair direct
18 Sep - 25 Sep Icelandair direct
27 Sep - 06 Oct easyJet
26 Sep - 29 Sep Icelandair direct
18 Sep - 22 Sep Icelandair direct
30 Sep - 03 Oct Icelandair direct
29 Sep - 08 Oct Icelandair direct
27 Sep - 08 Oct Icelandair direct
09 Sep - 16 Sep Icelandair direct
09 Sep - 17 Sep Icelandair direct
05 Sep - 07 Sep Icelandair direct
22 Sep - 06 Oct Vueling Airlines
29 Sep - 10 Oct easyJet
19 Sep - 01 Oct Icelandair direct

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

Skyscanner

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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