AirHint found the following cheapest return flights from London (LTN) to Keflavik (KEF) in July 2025 (see full year).

Return flights

30 Jul - 02 Aug	Wizz Air
30 Jul - 06 Aug	Wizz Air
27 Jul - 30 Jul	easyJet	direct
30 Jul - 06 Aug	easyJet	direct
30 Jul - 03 Aug	easyJet	direct
09 Jul - 23 Jul	Jet2
10 Jul - 16 Jul	Wizz Air
28 Jul - 02 Aug	Wizz Air
30 Jul - 05 Aug	Wizz Air
10 Jul - 23 Jul	Wizz Air
27 Jul - 03 Aug	easyJet	direct
15 Jul - 23 Jul	Wizz Air
28 Jul - 31 Jul	Wizz Air
05 Jul - 15 Jul	Jet2
16 Jul - 30 Jul	Ryanair
28 Jul - 06 Aug	Wizz Air
16 Jul - 27 Jul	Ryanair
05 Jul - 10 Jul	Jet2
31 Jul - 02 Aug	Ryanair
30 Jul - 23 Aug	Wizz Air

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 223€

Return flights