Cheapest return LCY–KEF flights, May

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

Return flights

29 May - 04 Jun SWISS
29 May - 06 Jun SWISS
29 May - 02 Jun SWISS
27 May - 31 May KLM
27 May - 09 Jun SWISS
30 May - 04 Jun KLM
29 May - 10 Jun SWISS
31 May - 04 Jun KLM
28 May - 31 May Lufthansa
29 May - 31 May SWISS
29 May - 03 Jun British Airways
31 May - 05 Jun KLM
31 May - 07 Jun KLM
27 May - 29 May SWISS
27 May - 28 May SWISS
24 May - 31 May KLM
26 May - 27 May British Airways
22 May - 27 May KLM
24 May - 27 May KLM
26 May - 28 May KLM

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

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