Cheapest return flights from London to Keflavik in September from $200

Best time to book flights for London (LGW) to Keflavik (KEF) flights at AirHint

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

Return flights

10 Sep - 17 Sep easyJet
09 Sep - 24 Sep easyJet
27 Sep - 09 Oct Wizz Air Malta
05 Sep - 17 Sep easyJet
12 Sep - 16 Sep easyJet
27 Sep - 10 Oct Icelandair direct
28 Sep - 09 Oct Icelandair direct
30 Sep - 13 Oct Icelandair direct
25 Sep - 12 Oct Icelandair direct
29 Sep - 06 Oct Icelandair direct
26 Sep - 11 Oct Icelandair direct
27 Sep - 04 Oct Icelandair direct
27 Sep - 11 Oct Icelandair direct
19 Sep - 05 Oct Icelandair direct
03 Sep - 08 Sep easyJet
06 Sep - 20 Sep easyJet
06 Sep - 20 Sep Icelandair direct
22 Sep - 30 Sep Icelandair direct
08 Sep - 15 Sep Icelandair direct
01 Sep - 08 Sep 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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik