Cheapest return flights from London to Keflavik in May from $275

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 - 05 Jun SWISS
21 May - 26 May SWISS
09 May - 03 Jun SWISS
21 May - 29 May SWISS
09 May - 13 May Lufthansa
14 May - 29 May SWISS
16 May - 26 May SWISS
09 May - 16 May Lufthansa
14 May - 19 May SWISS
30 May - 03 Jun SWISS
16 May - 27 May SWISS
14 May - 23 May SWISS
10 May - 14 May ITA Airways
30 May - 10 Jun SWISS
28 May - 04 Jun SWISS
07 May - 04 Jun Aer Lingus
26 May - 02 Jun Lufthansa
22 May - 08 Jun KLM
29 May - 29 Jun KLM
28 May - 02 Jun SWISS

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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