Cheapest return flights from London to Keflavik in May from $374

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

Return flights

08 May - 19 May SWISS
27 May - 01 Jun SWISS
22 May - 26 May SWISS
08 May - 10 May Lufthansa
12 May - 19 May KLM
20 May - 27 May KLM
06 May - 13 May KLM
08 May - 12 May Lufthansa
10 May - 15 May KLM
16 May - 23 May SWISS
22 May - 31 May KLM
29 May - 03 Jun KLM
25 May - 05 Jun KLM
28 May - 24 Jun KLM
30 May - 03 Jun KLM
31 May - 14 Jun KLM
27 May - 24 Jun KLM

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

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