Cheapest return flights from London to Keflavik in May from $337

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

Return flights

06 May - 11 May SWISS
06 May - 12 May SWISS
15 May - 19 May Lufthansa
08 May - 14 May Lufthansa
01 May - 04 May Lufthansa
25 May - 28 May Lufthansa
01 May - 05 May Lufthansa
01 May - 03 May KLM
20 May - 27 May KLM
06 May - 10 May KLM
31 May - 03 Jun KLM

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

Skyscanner

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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