Cheapest return flights from London to Keflavik in May from $292

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

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

Return flights

28 May - 03 Jun SWISS
09 May - 15 May SWISS
12 May - 19 May Lufthansa
12 May - 15 May Lufthansa
30 May - 03 Jun SWISS
14 May - 19 May SWISS
14 May - 22 May SWISS
07 May - 13 May SWISS
06 May - 13 May British Airways
19 May - 23 May KLM
19 May - 26 May KLM
15 May - 18 May KLM
26 May - 02 Jun KLM
26 May - 04 Jun KLM
28 May - 02 Jun SWISS
29 May - 05 Jun KLM
29 May - 04 Jun KLM
29 May - 02 Jun KLM
19 May - 02 Jun Lufthansa
30 May - 04 Jun British Airways

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

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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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