Cheapest return flights from London to Keflavik in September from $110

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

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

Return flights

03 Sep - 10 Sep easyJet direct
24 Sep - 01 Oct easyJet direct
10 Sep - 14 Sep easyJet direct
03 Sep - 14 Sep easyJet direct
10 Sep - 17 Sep easyJet direct
03 Sep - 07 Sep easyJet direct
10 Sep - 21 Sep easyJet
24 Sep - 28 Sep easyJet direct
05 Sep - 14 Sep easyJet
10 Sep - 21 Sep easyJet direct
05 Sep - 17 Sep easyJet
19 Sep - 05 Oct easyJet
27 Sep - 01 Oct Wizz Air UK
27 Sep - 09 Oct Ryanair
20 Sep - 05 Oct Ryanair
29 Sep - 04 Oct easyJet

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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