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

Return flights

01 Jul - 06 Jul	SWISS
01 Jul - 16 Jul	SWISS
01 Jul - 07 Jul	SWISS
13 Jul - 16 Jul	SWISS
15 Jul - 26 Jul	SWISS
15 Jul - 22 Jul	SWISS
22 Jul - 30 Jul	SWISS
03 Jul - 06 Jul	Lufthansa
12 Jul - 16 Jul	SWISS
23 Jul - 28 Jul	SWISS
31 Jul - 20 Aug	Lufthansa
26 Jul - 04 Aug	Lufthansa
31 Jul - 16 Aug	Lufthansa
27 Jul - 03 Aug	Lufthansa
31 Jul - 17 Aug	Lufthansa
30 Jul - 02 Aug	SWISS
26 Jul - 02 Aug	Lufthansa
26 Jul - 07 Aug	SWISS
23 Jul - 02 Aug	SWISS

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

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 July from 445€

Return flights