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

Return flights

27 Jul - 30 Jul	easyJet	direct
29 Jul - 05 Aug	Jet2
28 Jul - 06 Aug	Wizz Air UK
27 Jul - 06 Aug	easyJet	direct
30 Jul - 05 Aug	Wizz Air UK
27 Jul - 03 Aug	easyJet	direct
30 Jul - 06 Aug	easyJet	direct
30 Jul - 03 Aug	easyJet	direct
28 Jul - 30 Jul	easyJet
29 Jul - 02 Aug	Jet2
27 Jul - 29 Jul	easyJet
26 Jul - 29 Jul	Ryanair
26 Jul - 30 Jul	Ryanair
29 Jul - 31 Jul	Wizz Air UK
28 Jul - 03 Aug	Wizz Air UK
27 Jul - 27 Jul	easyJet
27 Jul - 12 Aug	easyJet
26 Jul - 31 Jul	Ryanair
27 Jul - 31 Jul	Wizz Air UK
26 Jul - 28 Jul	Jet2

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 407€

Return flights