Cheapest return flights from London to Keflavik in September from $213

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

Return flights

18 Sep - 30 Sep easyJet
13 Sep - 16 Sep Ryanair
05 Sep - 19 Sep Ryanair
26 Sep - 03 Oct Ryanair
27 Sep - 03 Oct Ryanair
23 Sep - 27 Sep Ryanair
03 Sep - 24 Sep Ryanair
09 Sep - 12 Sep Ryanair
01 Sep - 03 Sep Ryanair
16 Sep - 20 Sep Ryanair
04 Sep - 06 Sep easyJet
02 Sep - 19 Sep Ryanair

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

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