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

Return flights

09 Jul - 23 Jul	easyJet	direct
07 Jul - 09 Jul	Wizz Air
02 Jul - 03 Jul	Wizz Air
30 Jul - 03 Aug	easyJet	direct
02 Jul - 09 Jul	Wizz Air
27 Jul - 30 Jul	easyJet	direct
09 Jul - 30 Jul	Wizz Air
09 Jul - 30 Jul	easyJet	direct
27 Jul - 03 Aug	easyJet	direct
22 Jul - 27 Jul	easyJet
01 Jul - 09 Jul	Wizz Air
02 Jul - 16 Jul	Wizz Air
30 Jul - 10 Aug	easyJet	direct
30 Jul - 06 Aug	easyJet	direct
28 Jul - 03 Aug	Ryanair
25 Jul - 03 Aug	easyJet
27 Jul - 06 Aug	easyJet	direct
31 Jul - 03 Aug	Ryanair
18 Jul - 03 Aug	easyJet
28 Jul - 02 Aug	Ryanair

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 $263

Return flights