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

Return flights

03 Jul - 16 Jul	SWISS
14 Jul - 31 Jul	KLM
03 Jul - 06 Jul	Lufthansa
23 Jul - 30 Jul	SWISS
01 Jul - 15 Jul	KLM
02 Jul - 06 Jul	SWISS
13 Jul - 17 Jul	SWISS
03 Jul - 07 Jul	SWISS
10 Jul - 15 Jul	KLM
10 Jul - 19 Jul	KLM
30 Jul - 07 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 537€

Return flights