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

Return flights

10 Jun - 24 Jun	KLM
07 Jun - 26 Jun	KLM
07 Jun - 11 Jun	KLM
21 Jun - 26 Jun	KLM
04 Jun - 11 Jun	KLM
14 Jun - 17 Jun	KLM
03 Jun - 17 Jun	KLM
03 Jun - 10 Jun	KLM
09 Jun - 18 Jun	KLM
23 Jun - 28 Jun	KLM
23 Jun - 01 Jul	KLM
10 Jun - 22 Jul	KLM
14 Jun - 05 Jul	KLM
28 Jun - 05 Jul	KLM
24 Jun - 07 Jul	SWISS
25 Jun - 02 Jul	KLM
22 Jun - 13 Jul	SWISS
26 Jun - 02 Jul	SWISS
30 Jun - 03 Jul	KLM
29 Jun - 03 Jul	KLM

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

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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Cheapest return flights from London to Keflavik in June from 263€

Return flights