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

Return flights

01 Jun - 08 Jun	Lufthansa
05 Jun - 09 Jun	Lufthansa
05 Jun - 16 Jun	Lufthansa
15 Jun - 18 Jun	Lufthansa
19 Jun - 23 Jun	Lufthansa
19 Jun - 22 Jun	Lufthansa
01 Jun - 04 Jun	Lufthansa
22 Jun - 28 Jun	Lufthansa
12 Jun - 21 Jun	Lufthansa
26 Jun - 30 Jun	Lufthansa
28 Jun - 14 Jul	SWISS
19 Jun - 03 Jul	Lufthansa
29 Jun - 05 Jul	Lufthansa
28 Jun - 05 Jul	SWISS

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 307€

Return flights